[NSAID]

It'd be even better if my user agent could simply indicate my acceptance (or lack thereof) for me

[kylel]

This is what Do Not Track was supposed to be. Unfortunately it never got much momentum. Google, Facebook, Twitter, etc. ignore the DNT header.

[jasonkostempski]

Another useless attempt at reducing tracking I wish would be banished from the web. The amount of pollution in web standards; official, legal, or accidental; is becoming just as annoying as the annoying things they're trying to fix.