User blog comment:Kirkburn/Technical Update: March 25, 2015/@comment-24473195-20150327161427/@comment-126761-20150330153034

It's very doubtful we'd implement a block like this, exactly because of the possibility of false positives - it would likely cause more trouble than it would solve. (We would certainly like to reduce the number of JS errors around the site though).

Please do send in false positives to Special:Contact/bug - that way we can review and (hopefully) remove them.