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European Union set to revise cookie law, admits cookie banners are annoying
(www.techspot.com)
This is a most excellent place for technology news and articles.
The "do not track" is really just you asking them politely not to track you, they are not obligated to stop tracking...more often than not, it is completely ignored and they track you anyway.
...and the request itself can be used as a data point for tracking.
California's regulations have teeth but there are some exclusions and exemptions, I guess like most laws it'll only be followed if suing and getting damages is easy and results made public.