Hell, with just a few comments I can identify people/alts on HN (or other social media sites)...
https://twitter.com/AustinGWalters/status/104189476543920128...
Lobbying has corrupted US democracy, freedom, privacy, and legislation to the point that these may never recover. The moment something GDPR-like will be drafted, those snakes (large corporations & lobbies) will do their best (aka bribe $$$$$$$$$$$$) to stop this. (for those who don't like the word bribe, feel free to replace with 'donate' - but imho paying someone elected to change their mind and go against the people's interests, is pure bribery-fraud)
Once a USA-GDPR moves in (which will never happen), people will start to wake up and smell the coffee, and realize that the threat is real. That awakening will lead to another issue.
The 3-leter-agencies (whether in the Light or in the Dark) will also fight this tooth and nail. Now they have a sweet deal. They spy on everyone, people are stupid/naive/careless enough to publicise every-thing they do/eat/say. In a USA-GDPR scenario where civilians will start 'thinking' again, agencies will have to try harder (aka increased budget/spending) to hoard the same amount of information.
It's "California only", but companies have little choice but to implement it for the entire US (much like car manufacturers building all US cars to meet Cali emission standards).