I thought about it for a day, and decided to set the wiki to only be editable by those with a confirmed email address. The main reason is that I don’t have time to fight spam now, and this may help. It isn’t a permanent decision, though I fear that I may just leave it like that out of frustration.
Eventually I hope to find a different method for combating spam, and if I went ahead with my plans for a wikae cluster and filled it with active communities, it might work. I’ve got to think about this, but I don’t have the energy to do so now.