Whether you love it or hate it, Twitter is an extremely powerful tool on the internet that has the potential to connect everyone. But still, some people are not privy to the power this social media platform has. If you are upset at something, feel like having an outburst, or want to share your extremely controversial view, its best to not do it over social media. Well, these next 10 people didn’t follow that advice and when their employers caught wind of their tweets, they were fired. Read on and learn about 10 people who got canned because of their tweets.

10. Catherine Deveny

Deveny is an Australian stand-up comedian and comedy writer. She used to work as a regular columnist for The Age newspaper, but judging from her appearance on this list, I’m sure you know what happened to her. In 2010, during the Logies Award ceremony (think the Australian version of the Emmys) she posted a series of extremely tasteless tweets. These tweets included a comment about the underage Bindi Irwin needing to get laid and an extremely distasteful post that centered on Rove McManus’s first wife who passed away due to having breast cancer. In a shock to no one, Deveny was fired as numerous people showed outrage over her posts, whether they were meant as jokes or not.

9. Damian Goddard

Goddard was a Toronto-based sports reporter who was best known as an anchor and TV personality on Sportsnet. In 2011, Goddard made a tweet about his opinion on same-sex marriage. In the tweet, he wrote that he supported hockey agent Todd Reynolds and his view on the supposed “TRUE” meaning of marriage between a man and a woman. He was quickly and swiftly fired by Rogers Sportsnet, but has continued to stand by by his tweets.

8. Mike Bacsik

Mike Bacsik is a former MLB pitcher, who is probably best known for being the guy that Barry Bonds hit his record breaking 756th home run off of. After his baseball career, Bacsik worked as a producer on The Ticket. In 2010, during the 2010 NBA Playoffs, is when Bacsik made his terrible. Following a San Antonio Spurs victory over his hometown Dallas Mavericks, Bacsik sent out a tweet that read “Congratulations to all the dirty Mexicans in San Antonio.” Of course, this quickly spread throughout Twitter and outraged thousands. He deleted the tweets and later apologized, but the damage was already done by then and he was fired from his job.

7. Scott Bartosiewicz

Bartosiewicz was a social media strategist for New Media Strategies, who were employed by Chrysler to run their social media accounts and therefore, Bartosiewicz had access to the official Chrysler Twitter account. His problem came up when he made the mistake of believing he was signed into his own social media account, when he was signed into Chrysler’s. He tweeted out a message that criticized the drivers in Detroit and even contained an expletive. Of course, the tweet went viral and Bartosiewicz was fired from the company he worked for and Chrysler did not renew their contract with New Media Strategies.

6. Carly Mckinney

Carly Mckinney was a 10th grade high school math teacher in Colorado and made headlines in 2013 for a variety of inappropriate social media posts. A local news station discovered a number of things that a teacher probably shouldn’t have on the internet such as half-naked pictures, images of her smoking pot and a number of inappropriate tweets. She was promptly fired for this, but she is likely just one of many different teachers that have been fired for questionable social media posts.

5. Nicole Crowther

Nicole Crowther, a former Los Angeles film student, has been an extra for a number of TV shows and movies, including the popular series Glee. However, she is likely best known known not for her acting, but for her tweets. After her short stint on Glee, she took to Twitter and made some questionable tweets regarding show spoilers. She ended up sending a tweet that disclosed who the Prom King and Queen was, which ruined the show for many fans. Even the one of the show’s producers/creators took to Twitter to voice his displeasure with her and said “hope you are qualified to do something other than work in entertainment”. Ouch.

4. Chad Shanks

For a couple of years, Chad Shanks was a social media manager and was the man behind the Twitter account for the Houston Rockets. Following a first round series in which his Houston Rockets were victorious over the Dallas Mavericks, Shanks found himself in the heat of the moment and sent out a tweet that he would soon regret. The aforementioned tweet featured emojis of a horse and a gun, with the words “Shhhh. Just close your eyes. It will all be over soon.” The tweet soon went viral and forced the Rockets to issue a public apology and led to Shanks being fired. In retrospect, Shank said that he should have been able to anticipate the type of reaction the tweet would get as soon as he hits that send button.

3. Gilbert Gottfried

In one of the few entries on this list that features a celebrity, we have none other than comedian Gilbert Gottfried. The stand-up comic and actor is best known for his unique voice, which helped him get the job of being the Aflac duck in the commercials that I’m sure you are all familiar with. Well, in 2011, he decided to post a tweet that would force him to lose this job. After the Japanese earthquake and Tsunami disaster, Gottfried made a distasteful joke on Twitter, saying “Japan called me. They said ‘maybe those jokes are a hit in the U.S., but over here, they’re all sinking,'” and Aflac (who does 75% of their business in Japan) had no choice but to fire the comedian.

2. Nir Rosen

Nir Rosen is an American journalist who is best known for his work throughout the Iraq War, and his distasteful tweets are likely the most controversial and disgusting on this list. In 2011, Rosen made a tweet regarding Lara Logan, the CBS correspondent who was beaten and sexually assaulted during the riots in Egypt. In the tweet, Rosen suggested that Logan was trying to “outdo” Anderson Cooper, who was just assaulted days earlier, although not sexually. He also added that it would have been funny if a sexual assault had occurred to Cooper as well. These disgusting tweets rightfully got him fired from his position as a fellow at NYU’s Center on Law and Security.

1. Justine Sacco

And coming in at number one is arguably the most famous and publicized example on this list—the story of Justin Sacco. Sacco, who worked as a PR consultant, made a tweet that she claimed was a joke to her small group of 170 followers as she was boarding a plane on a trip, but that tweet would forever change her life. The tweet read “Going to Africa. Hope I don’t get AIDS. Just kidding. I’m white!” The tweet went viral after a tech blogger retweeted it to his 15,000 followers and the rest was history. As soon as she got off the plane, she saw the horrible press she had gotten and the hashtag #HasJustineLandedYet went viral and the whole fiasco caused her to lose her job.