This is why I think a GitHub-style model is more suitable for certain open, collaborative information - it's simply less prone to abuse. The editing and submission process is significantly more structured than a wiki, which prevents attacks like this.
Wikipedia has "pending changes" which is a bit like a pull request type model: you make edit and it sits in a queue for a reviewer to approve.
It's running on some pages on English Wikipedia. I'd love to see it rolled out to a lot more pages. On some language versions of Wikipedia, it's running on all pages: Polish, for instance.
