Look, it's not like you need another reason not to use it, OK?

It seems that there are some pretty serious security problems with Chatroulette:

Boffins at the University of Colorado at Boulder and McGill University were able to show that a pre-recorded low-quality video of an attractive woman could fool the majority of participants into thinking the feed was live. The approach might be used as a prelude to phishing attacks, for example. The researchers also found it was possible to use an IP-mapping services to get a general location on another participant. A variety of man-in-the middle attacks, where hackers intercept and potentially manipulate the data stream between two participants, might also be possible.

How to put this delicately? Chatroulette has recently added automated penis-recognition technology. I'm guessing that their users aren't overly concerned about privacy.