As far as them selling or getting hacked, most of that stuff is and has been available on the market already, so I'm not sure how more hacked or sold it could get. I point people to Pam Dixon's testimony on data brokers all the time, but just in case anyone has missed it,
here it is again. There are more links and stuff in the privacy thread.
And it's true that you can't take back what's already out there, but there's new information to be gathered all the time, so if we did staunch the flow, it could die by attrition.
Also, holy cats, it is crazy how ignorant Trump's supporters are. Maybe it was the vague and largely nonsensical he said combined with the dumb marketing slogan or something, but the people who like him all have the weirdest and most counterfactual beliefs about how he must agree with them about their personal issues they care about.
These guys thinking he'd protect their internet privacy, I saw a guy who had convinced himself that Trump was going to legalize marijuana (AFTER he'd nominated Jeff Sessions!), and thedoc somehow seems to think that Trump is against eminent domain* and will destroy the Appalachian Trail.
It's been a months long process for me just trying to grasp the enormity of how stupid so many people are.
* In thedoc's defense, I don't think he knew the correct terminology for that, so maybe he'd just not been able to look it up.