Board Thread:Site Discussion/@comment-25501246-20160707001720/@comment-985184-20160708130443

The Kamen Rider Wiki (and the Power Rangers Wiki which I think is run by some of the same people) has a fairly no-nonsense approach to the social aspect of Wikia. Basically, there are no comment sections for the articles, and if you're using the talk pages or threads for anything that doesn't involve contributing information to the wiki (General fandom talk or the kind of spam you've cited), it gets closed with a simple reason of "Wiki ops only".

As an aside as well, whenever a new show comes along I notice they tend to put a lock on all articles relating to it for a while, so only mods/admins can edit. This seems to just be to avoid a flood of contributions and/or false information.

That isn't to say their approach is ideal or preferred, it's just another way to look at how things could be handled.