The plain fact is, it's rather hard for someone in a chat room to 'threaten' you or 'harrass' you if you aren't sharing personal info with them. If you don't like what they say, you can click 'ignore' so you don't see their posts, and you can shut them out so they can't send mail or IMs.
In other words, don't share personal info with random people in chat rooms.
I am only speaking on things I have seen done to others.
I am waiting to see what type of law suits arise from these new laws. It will be very interesting.