Dating (or being very close personal friends) with Justin Bieber comes with a special set of liabilities, as teen sweetheart Selena Gomez has discovered during the past few days.

After photos surfaced of the pair getting cozy on a yacht in the Caribbean, Bieber's fans got nasty about Gomez on Twitter. In fact, they moved beyond nasty to downright vicious and threatening.
Some anti-Selena tweets have included:

Former FBI agent and security expert Harold Copus of Copus Security Consultants in Atlanta says that even though these threats were sent over something as seemingly innocuous as Twitter, Bieber and Gomez should consult their security teams and take the threats with the appropriate dose of concern.

"I think any time you receive a threat over Twitter or anonymous letter, you have to be somewhat concerned," Copus says. "They may look to increase their security. They may factor this into a variety of other information they know about potential threats and figure out where this piece of information fits in the puzzle."
 
Copus says this could very well be an isolated case of rabid fans upset over the fact that their idol may have a new girlfriend, but still, a celebrity can never discount any threat.
"If I was running that security detail, this would be on my radar screen," Copus tells PopEater.
Gomez isn't the first suspected paramour of Bieber's to receive threats. Back in May, after Bieber tweeted a picture of himself with Kim Kardashian, fans attacked the much older celebrity on Twitter, too. Thankfully, no Kardashian was harmed