My wiki is experiencing a lot of vandalism lately. I would like to implement things to reduce the amount of vandals allowed into the system. Perhaps limiting the number of edits by brand new users? Requiring a valid email address by new users? Requiring a full name? One thing I would really like to do is to limit the number of characters in a new user id to less than about 12.
Is there any easy way to do any of this, like an extension or something already in the software?
Thanks a lot!