What does your wiki do about anon users? Do you have them as a large part of your editing family, or do you block them from your wiki to avoid potential vandalism? Have you found anons to be beneficial or detrimental to your wiki? Discuss bellow.

Personally, on Doctor Who Answers, most of our editors are regular IP users. In fact, the user with the IP address which usually starts with 89 is probably one of the site's best editors. Because most IP addresses don't change too much, many of our IPs act sort of pseudo registered, with their identity being known via the first few numbers of their IP. These IP editors have definitely been an addition to the site. DWA would be dead without them.