Treat Witches as you would your friends, Soon as they start getting whiney beat the ♥♥♥♥ out of 'em.

If you joined, then, congratulations! You've just joined a minority of L4D2 players. If you have Left 4 Dead 2, please try to make your teamates NOT kill Witches, only to startle it yourself. If you're hoping for some private server or something then sorry, you're out of luck. Most members will also play CS:GO so feel free to team up.