Because a thread a day keeps the minges away. Or at least, a thread with a bunch of minges every once in a while keeps getting the minges banned. In this case, we've got a minge going by the name of Vlandri admitting quite clearly to using a speedhack.

In-Game Name: Vlandri
Steamid: STEAM_0:1:37768656
Server/s: FP RP server
Reason for ban: Admitted speedhacking, prop killing

Evidence (screenshot/console etc):
steamcommunity.com/id/remmon/screenshot/559776799911261414
steamcommunity.com/id/remmon/screenshot/559776799911258550

First admitting to speed hacks, then mentioning the hack used.
Alas, I do not have any screenshots of him prop killing, nor do I have a demo as I never saw the guy.

Yep i seen this.

He crashed me twice trying to deal with him.

For a bit of variation, here's a demo of Jackerus (STEAM_0:0:9771725) and his friend Fpic (STEAM_0:1:22015479) as they go around prop blocking, prop killing and then when those two don't help keep them alive, they block spawn.

In-Game Name: Jackerus, Fpic
Steamid: STEAM_0:0:9771725, STEAM_0:1:22015479
Server/s: FP RP server
Reason for ban: Propkilling, prop surfing, prop blocking, blocking spawn.

Evidence (screenshot/console etc):
www.megaupload.com/?d=9GLMK1QY

That jack bloke was on earlier in the morning - told kokain but it was too late - he left saying "i'll come back later to crash the server" STEAM_0:0:9771725 <-- thats how I know!

Usually this happens when im either in school or sleeping.

Or doing something else

i agree hes propblockking spawn too and propkilling hes minge...