Kutcher got into hot water last month when he fired off a tweet defending Penn State coach Joe Paterno after Paterno was implicated in a scandal related to assistant coach Jerry Sandusky’s alleged history of sexually molesting children. “How do you fire Jo Pa? #insult #noclass as a hawkeye fan I find it in poor taste,” the tweet said. Later on, Kutcher tweeted, “Heard Joe was fired, fully recant previous tweet!” and “Didn’t have full story. #admitwhenYoumakemistakes.” Shortly afterwards, Kutcher announced that he was turning over the management of his Twitter account to Katalyst Media, a firm he co-owns.
Comedian Gottfried, who is known for pushing the envelope (he was the first mainstream comedian to joke about 9/11 -- just three weeks after the attacks), tried out some material about the earthquake/tsunami that hit Japan in March, just a few days after the tragedy hit. Within a day or so, Gottfried lost his gig doing the voice of Aflac's duck in that company's commercials.
The volatile singer deleted most of his Twitter timeline last month after he got sick of fans' comments about his ex, Rihanna, whom he was charged with assaulting in 2009.
The former Congressional rep from New York was caught tweeting a lewd picture of himself to a Seattle student named Gennette Cordova in May. Though Weiner initially denied the charge, on June 6, he admitted it and eventually lost his seat.
O'Connor quit Twitter in November because she was "getting too much abuse," according to The Daily Mail. The singer, best known for her 1990 hit "Nothing Compares 2 U," also blamed fans for taking her sex-related comments "too seriously." (O'Connor offers more in a NSFW rant on her website.)
The designer/brand name upset fans in February with a /tweet that made light of the Arab Spring. "Millions are in uproar in #Cairo," he wrote. "Rumor is they heard our new spring collection is now available online at [link]."
Arison, the owner of the Miami Heat, was fined $500,000 in November for tweeting about the NBA lockout. Arison's comment was innocuous, but violated an agreement with the league not to discuss the matter in public.