Sup, found interesting thread from RU topic by Mr_Black_Jak
he says if you get attacked with knife from the front, and press "redeployment" from ESC menu (or relocation dunno, my game not in Eng language), then server will get crashed. I didnt tested it yet. Tell me if it works.
So has anyone confirmed if its a client crasher or a server crasher
Well I crashed and my friend was still playing on the same server, so I guess it doesn't, or at least I wasn't doing it properly. I might try it again, but getting people to knife you rather than shooting you is slightly difficult.