Moderators should probably be able to lock those like normal posts if that isn't possible yet.
Push it to the community eyeballing changes with a Recent Changes to Tag Wikis page.
It's not enough that you first have to find your way through the thicket, but tracking your changes with a smothering of sardines in a cat lady's home only gets you enough before you're downed by the whiskers.
Another thought to flag is a page noting recent changes to tag wikis. Like a stink smear, greasing up the recent activity oil when the mechanic pulls that dipstick out and wipes it down with that rag that's been all over town.
And then everybody can share in the blame (as well as pitchfork running) of bad and poor-faith edits.