I'm almost sure that the traditional (ha!) wiki model where everyone is free to edit is not meant to be functional under the modern internet anyway. A verified and/or interested user model (the OP mentions this possibility in the heading "Community-specific questions", too bad that the second example image is too ambiguous even for anime fans though) seems to work though; I've seen it being much effective on, for example, the Esolang wiki [1].

[1] https://esolangs.org/wiki/Special:CreateAccount "Which number does this Befunge code output: [...]"