I take this as proof that those who legislate should not try to control the situation. They, and those associated with them, tend not to have much clue, they only make things worse. For those, who are concerned enough to act, I see their their jobs as letting us do our own filtering, to eliminate the unwanted surveillance.
Me I want to tell sites (in the request) what surveillance I will or won't accept so they can just do it without annoying me. In the process I want to know what surveillance they would otherwise try, that way I'm able to switch them off, in my DNS, even if they do the right thing when asked.
It's not hard, it's not rocket science, it's all doable. DNT failed because there are too many scum, if something like that were legislated it would do a better job.
Would help avoid things like:
1. Those dumb cookie warning idiocies.
2. GDPR legislation that has made surveillance arguably worse by strengthening the hands of Google and Facebook.
3. Things like all these clueless government web sites would be more of a non-issue, if you could skewer the surveillance.
4. If you look at the medical government web sites, they may be auctioning off selected searches, different in each country. This would stop that, for those who took the time AND show visitors which ones are corrupt.