Always think before you tweet. New York Rep. Anthony Weiner learned that the hard way (no pun intended) this past week after accidentally tweeting lewd photos of himself, denying it before finally admitting it in a rambling and odd press conference Monday. But Weiner isn't the only public figure, let alone politico, to commit a Twitter faux pas. Behold nine other celeb tweeting gaffes.Sen. John McCain's daughter drew backlash after tweeting a photo of herself holding a book in a low-cut, cleavage-baring top. The uproar got so bad that she said she was considering deleting her Twitter account (she didn't). "when I am alone in my apartment, I wear tank tops and sweat pants, I had no idea this makes me a 'slut,' I can't even tell you how hurt I am," she wrote.8. Arnold Schwarzenegger's Cutting-Edge PoliticsIn 2009, the former Governator posted a video thanking his constituents for their budget-cutting ideas while wielding a large knife, upsetting many given how seriously his proposed plan would affect Californians. "Not that I have fun with making the cuts — they sadden me — but ... that doesn't mean that you cannot wave a knife around, or to wave your sword around, to get the message across that certain cuts have to be made because it's budget time," Schwarzenegger said. 7. Mark Cuban's Foul PlayThe Dallas Mavericks owner was fined $25,000 by the NBA in 2009 after tweeting complaints about the referees in a Mavericks-Denver Nuggets game. "how do they not call a tech on JR Smith for coming off the bench to taunt our player on the ground ?" he wrote. After hearing about the fine, Cuban tweeted, "can't say no one makes money from twitter now. the nba does."6. Jim Carrey, Marriage CounselorBecause tweeting about his own love life isn't enough, Carrey weighed in on Tiger Woods' cheating scandal last year. "No wife is blind enough to miss that much infidelity," Carrey tweeted about Wood's ex-wife, Elin Nordegren. "Elin had 2 b a willing participant on the ride 4 whatever reason. kids/lifestyle ;^)" After fans suggested he had cheated on Jenny McCarthy, Carrey wrote that he doesn't condone infidelity. "In any event, infidelity has never been an issue 4 me. If I tried to keep a secret like that, I would grow a tumor and devil horns! }:^<- "5. Sarah Palin's Favorite MistakeDespite her frequent use of Twitter to fire off missives, Palin isn't as tech savvy as you think — or so she says. After she favorited a photo tweeted by Ann Coulter that showed a church sign calling President Obama a "Taliban Muslim," Palin blamed it on the Blackberry. "I've never purposefully 'favorited' any tweet," Palin said afterward. "I had to go back to my BlackBerry to even see if such a function was possible. I was travelling to Alaska that day ... it was an obvious accidental 'favoriting.'" Anyone want to refudiate this?4. Bad Fashion Statement, Part ITrying to cash in on a trending hashtag, Kenneth Cole used the uprising in Eygpt in February to pimp his company's spring collection: "Millions are in uproar in #Cairo. Rumor is they heard our new spring collection is now available online at http://bit.ly/KCairo." The tweet was later removed and Cole turned to another social network — Facebook — to apologize. "I apologize to everyone who was offended by my insensitive tweet about the situation in Egypt. I've dedicated my life to raising awareness about serious social issues, and in hindsight my attempt at humor regarding a nation liberating themselves against oppression was poorly timed and absolutely inappropriate."3. Upskirt UproarAh, that other crotch shot! Perez Hilton stirred up more drama in 2010 when he posted an upskirt shot of Miley Cyrus seemingly not wearing underwear as a commentary on her "oversexualized" behavior of late. Unlike most celebs, Hilton wasn't remorseful, saying he would do it again (he did, tweeting another photo a week later). But the racy shot cost him an advertiser in ABC and had him possibly facing child pornography charges since Cyrus was underage then. He was never charged and maintained that the starlet was wearing underwear. "Do you think I'm stupid enough to post a photo of Miley if she's not wearing any underwear down there? No!" he said. "Sure I like to seem controversial, but I don't want to go to jail."2. Bad Fashion Statement, Part IICourtney Love's 140-character rants about fashion designer Dawn Simorangkir deprived her bank account of $430,000. Simorangkir sued Love over her March 2009 tweets, accusing Love of making false statements about her having a criminal past. The two settled before the case went to trial. Had it gone to trial, it would've been the first trial in which a jury decided whether a celebrity's Twitter posts could be considered libel. For now, they're just the costliest tweets ever.1. Gilbert Gottfried's Insensitive Quacks, Er, CracksAflac canned Gottfried, the voice of its signature duck mascot since 2000, after the comedian tweeted several tasteless jokes about the earthquake and tsunami in Japan that claimed hundreds of lives in March. Gottfried apologized, but the damage was already done, and the insurance company soon waddled to an equally nasal-voiced Daniel McKeague, a father of three from Hugo, Minn., to be its new spokesman.