"pc master race(uid=76561198261608374)"
after kicking the above name with GUID, i determined his Steam ID is: http://steamcommunity.com/profiles/76561198261608374/
the other player i believed to be a hacker, happens to be friends with him on Steam as well and logged out/disconnected soon after i kicked the first player.
the 2nd suspected players Steam ID is : http://steamcommunity.com/profiles/76561198095811629