Ne~ Akurei don't close your site because of other losers on the net! That means they win T__T.. there are too many people like this on the net..
Maybe make a 'Wall of shame' section on your site, naming this person as a hotlinker etc. to let everyone know this person is a leecher and to not bother with his/her site.. and if you have other Ku affiliated sites etc. maybe ask if they'll do the same? So all Ku fans know about this person..
Don't let people like this spoil your hard work ^__^v There isn't enough Ku sites on the net as it is ><..
EDIT: there are also anti-hotlinking scripts you can use, i found one on
this site.. dunno if it actually works.. if not search around google a little, there a quite a few sites with these sorts of scripts.