Como
Here's to Loonyology!
Personally, I don't think you can trust anyone on the internet. This is proven by incident's that happen all the time related to the internet, ie chat rooms/forums/social site's.
You can get to know people better, and then you feel you might be able to trust them a little. But in this instance of someone hacking your ps3, i don't think you should give your details to anybody, regardless of how well you feel you know them. Stick to mates in the real world or learn to do it yourself. That's my advice. =D