Originally posted by KewpieThanks Kewpie, that's great advice. I replied with the link to create a Fair Play ticket, but I'll put him on my ignore list now.
If he does it in a public forum you should report it. In game messages and PMs it's usually a mind game, he's trying to wreck your concentration. The correct response here is to put him on your ignore list, then he can't do it again because you will not see any messages that he posts. Then make sure that you wipe the board with him, that's the best thing you can do to these clowns.