Board Thread:Support Requests - Getting Technical/@comment-5558012-20160808164234/@comment-1757994-20160809004728

Dessamator wrote: ... all they'd need to do is make the script opt-in instead of default. ... Changing the code to opt-in instead of opt-out would break the way it works for everyone who currently uses it.

EDIT: Hmm... A cookie. Set the cookie in user JS. Test for the cookie in the script. Chances are someone isn't going to create a page as the first thing they do on a wiki after logging in, so it should work and still be opt-out.