Leaving aside the sheer amount of stuff this will break, you're serving to identify yourself in another way, but perhaps not to an advertiser.

Given the average website, the number of people using a real web browser (i.e. not bots, curl, wget, etc) who don't run JS is going to be absolutely miniscule.

It's kind of like turning on Do Not Track - most people have it off, so you're highlighting yourself by turning it on.