Nice! There is a specification being worked on "[...]that conveys a person's request to websites and services to not sell or share their personal information with third parties".
https://globalprivacycontrol.github.io/gpc-spec/
Their landing page can be found here: https://globalprivacycontrol.org
@puresick not to diminish this effort, but we already hat the DNT header before that and nobody gave a shit about it. I don't think this problem can be solved by technology alone :-(