I spotted this guy today on the server. For me he seemed pretty suspicious. The whole server was flaming to him about hacking.
His steam id: "Trav" 231 STEAM_0:0:4977084 271 1:34:19 109 0
and a demo I recorded:
http://rapidshare.com/files/78866821/trav.dem.html
Ups... sorry, I posted this two times because of my lagging net.