im not a part of pbbans.com but i can tell you that guy is definately cheating, view the demo with shownormals on and you can see him looking at players through the walls
just think yourself lucky you can only find one cheater on a server, if we dont get 10 a night its a good night, its starting to become ridiculous the amount of people cheating on our servers and all we can do to combat this is give them a ban that lasts for all of 30 seconds, if i saw this guy playing on one of the servers im an admin to id either let him go or just ref kick him, banning people is pointless all it is doing is creating a never ending list of ip addresses
if you have some sort of guid/alias/ip address tracker which we do all you can do is check if he has a static ip address, if he does ban that