Not trying to be an ass here, but you do realize that most time people need wiki, they need it because they need information about the subject and thus are in no condition to actually rewrite it?
Usually those wikis have also the problem that they either complain about my VPN connection IP or need some lengthy registration process, for which personally I am quite fed up, as you need different registrations nowadays in every second website always spending hours fighting against "name already taken - password is too short/simple/whatever"-battles until you finally are able to register... Only for your web-connection breaking at the final minute and all data being lost... Or wrong mail put in by auto-form.
Personally I have pretty much made myself a vow to never ever edit another wiki again for the sake of my sanity.
BTW, Complaining goes under the "right of speech", so it is basically a human right. Thus I try not to think too much when somebody complains, only check if it has any merit. But yes, I do understand that overt amounts of complaining even by separate persons does occasionally get on nerves...
PS. I personally think the wiki is great. There might be occasional outdated bits, but which wiki doesn't?