OP............. There is a way to block/report a user on this.........what ever you would call this website........ if you are private messaging someone, up at the top of your private conversation it says block / report user. Click that link. It will say something like (Click here) I don't want to receive any more messages from (the user) Click that ^ to block
Now to report
If you got to the users profile and it will say report click that link and choose why you want to report that user.