“What if instead of a user agent string, HTTP headers contained a string of your DNA, or a count of all the women that’ve ever rejected you for trying to get them to install Gentoo?”. Time to boycott web browsers I guess! even though none of it is mandatory! You’re really asking for someone to condescendingly send you the Wikipedia page for the slippery slope fallacy. I’m not going to be the one to do it, but I came close.