You know, guys, personally, I think you shouldn't talk behind his back. You know, if he reads this, and sees many of us (not me, though) dislike him, he'll get even more depressed, his personality will be even more rude.
And chr, you should have told him : "You need to make a picture to show your acts."
I get easily offended IRL too, with my friends, but they guessed it now, they try not offending me at all. It makes it much easier for me... Few years ago, my friends liked pissing me off.And I was just "launching" my hand at anyone nearby...