The most a warning like that from an ex girlfriend would do would make me a tiny bit more cautious. Who are you more likely to trust, the guy's possibly angry vengeful ex, or him, who you know and like?

Whiner, have you not ever had something bad happen to you? Sounds to me like regular catter actually got something useful out of this thread, but even if she didn't it's such a comfort just to tell people, and for them to say, aw that's sad. If it's going to make them feel better, and it's not going to make anyone else feel worse why shouldn't a person complain a bit?