be a duck.......
let it roll of your back 
You know what to do.......contact HTC and discuss it calmly.
You also know...although you are really "Teed" off, do not pursue this on the BBs.
The world is full of butt wipes......
follow what both Ink & 1Boner have posted............
but also, do a rightclick on his gameid in the roster and do a text report & a vox report ( if he was using vox as well )
and film it and/or take screenshots of the text buffer showing what was being typed ( you can enlarge the text buffer by toggling the ~ key )
save these films / screenshots to help back up your claims....... then, If You Need to Follow Up or need or asked to show Proof regarding, then go ahead with send an email with attached images to supportAThitechcreationsDOTco
m ( AT = @ DOT = . )
Do not give them the satisfaction by replying to them or letting such ignorant individuals know that they are or they might be getting to you or bothering you / upsetting you .....
doing as Ink post, and giving them the impression that it has no affect on you and you are "like a duck, letting the dirty water roll off your back" ............. will cause them to get all jacked out of shape and log or they will go try to find another person they can get a rise out of.....
edit: Nice post, ROC.... I fully agree

hope this helps
TC