Alec Baldwin deleted his Twitter account  following a series of angry tweets directed to a Daily Mail reporter yesterday. He came to pregnant wife Hilaria Thomas's defense due to a story claiming she was tweeting upbeat posts during James Gandolfini's funeral services. Alec later released a statement  and said the story was manufactured, while Hilaria shared her hurt over the situation on her own active account.
Twitter tension aside, other stars are just jumping on the social media platform. Liam Hemsworth joined Twitter this month despite not being so fond of the site back in October 2009, when he convinced his now-fiancée, Miley Cyrus , to deactivate her account. Since Twitter can be tricky, and yet addicting, to many celebrities, we've rounded up a list of stars who have a history of changing their minds about the microblogging site. From Demi Lovato's hot-and-cold feelings about the site to Ashton Kutcher 's online silence following a controversial tweet, see celebrities who go back and forth with 140 characters.
In June, Alec Baldwin  apparently fired off angry tweets after a British reporter accused his wife, Hilaria Thomas, of tweeting during James Gandolfini's funeral. He came to his pregnant wife's defense and later, in a statement to CNN , said the story about his wife was "disgraceful" and "manufactured." Hilaria took to her Twitter account to support Alec's actions and address the situation, but his account has since been deleted.
Liam Hemsworth joined Twitter  after convincing Miley Cyrus  in October 2009 to deactivate her social media account. He kicked off his induction with a promotional tweet for his upcoming movie Paranoia.
Follow Liam: @LiamHemsworth 
In May, Kanye West  deleted his entire Twitter feed except for a tweet announcing the release date of his Yeezus album. He continues to use the account for album promotions.
Follow Kanye: @kanyewest 
John Mayer  quit Twitter in June 2010 after calling himself a "tweetaholic" but rejoined later solely to keep fans up to date with his news.
Follow John: @JohnMayer 
Miley Cyrus  was swayed by Liam Hemsworth to deactivate her Twitter  in November 2009, tweeting, "FYI Liam doesn't have a Twitter and he wants ME to delete mine with good reason." Miley returned a year and a half later, but in March she threatened to leave once again after being plagued by Liam breakup rumors.
Follow Miley: @MileyCyrus 
Ashton Kutcher  announced he would no longer be running his Twitter account in November 2011 after he received flak for a controversial Joe Paterno comment. He returned to microblogging later that month.
Follow Ashton: @aplusk 
In April 2009, Matthew McConaughey  said, "Man, that Twitter deal, that's pretty bad, right?" He added that he wasn't comfortable letting everyone know when and where he was available. Despite being unsure at first, Matthew is now very active on his personal Twitter account.
Follow Matthew: @McConaughey 
Demi Lovato took a break from Twitter in January 2012 after receiving hate tweets. Although she did return, Demi quit Twitter in January 2013 again after ranting about trust issues but returned a few months later.
Follow Demi: @ddlovato 
Megan Fox  joined Twitter in January but said she was quitting after only a week . She tweeted, "5 days on Twitter and I have yet to discern it's purpose."
Follow Megan: @meganfox 
Lily Allen temporarily left Twitter  after an alleged British soldier sent her a racist message in July 2012.
Follow Lily: @lilyrosecooper 
In April 2009, Zac Efron  said he was staying away from social networking sites, including Twitter, because of privacy reasons, but in February 2012 he and a team began tweeting on his account.
Follow Zac: @ZacEfron 
Adele bid Twitter farewell in November 2012 after receiving insults and taunts  after giving birth to her first child. The following month she returned to sharing on the site.
Follow Adele: @OfficialAdele 
James Franco  abruptly quit Twitter in April 2011 when some of the corporate executives he was working with criticized his tweets. He reactivated his account in 2012.
Follow James: @JamesFrancoTV 
In April 2012, Nicki Minaj silenced her Twitter presence  following a Twitter feud with a fan site that was allegedly leaking her music. Despite the momentary lack of tweets, Nicki is now back in full force and even announced she was leaving American Idol via Twitter in May.
Follow Nicki: @NICKIMINAJ 
Charlie Sheen  claimed he was leaving Twitter in July 2012 after 16 months of microblogging but was back on the tweet deck in August.
Follow Charlie: @charliesheen 
In February, Shia LaBeouf  waged a Twitter war after quitting his Broadway play, Orphans, due to clashing with Alec Baldwin . He laid low following the exchange and took more to retweeting than speaking out himself.
Follow Shia: @thecampaignbook 
Sylvester Stallone said Twitter was "crazy"  in February but returned to tweeting the next month.
Follow Sylvester:@TheSlyStallone