Actually. the somker makes as much noise as the boomer (cough drop anyone?) the only one that is silent while walking is the hunter, he doesn’t growl until he crouches.
There are cheats in the game that people can use if the server has sv_cheats set to 1.
Oh yeah, alltalk is pointless on L4D versus servers as it negates the one advantage that the infected have, surprise
also, How would one pistol whip kill you? or did it just knock you off?