Get the Wikipedia Foundation on board and make sure the wikipedia or other big mediawiki hosts refuse to show any kind of content if such feature is detected in the browser.

Also, if you're a distro mantainer, configure apache and nginx defaults to make this is the default behaviour.

Even better: instead of redirecting to any wall of text with a long explanation of the political and technical reasons of this choice, just display a big, loud "ERROR" message stating that their browser is unsupported due to the presence of this module, and a small tutorial on how to deactivate it from the about:config page, if available.