It was a weak idea from the start. If you trust advertising companies to do what they say, then there's already an opt-out tracking system: http://www.networkad

It was a weak idea from the start. If you trust advertising companies to do what they say, then there's already an opt-out tracking system: http://www.networkadvertising.org/choices/ http://www.networkadvertising.org/choices/ The bad actors (particularly ones not based in the US) were going to ignore DNT anyway. Now, granted, it's technically far inferior to a DNT header (it sets a cookie on each ad network domain) but as far as I can tell it works and has worked for years.