This is all in the natural evolution of businesses. First come ambition and innovation, and with it the push into grey areas of regulation and ethical behavior (and sometimes even plain black, with allowing foreign entities to advertise for political causes (deplorably denied!)). It's the entrepreneurial spirit. Then these businesses overplay their hand, the bucket spills over with frustration from numerous sources, and the regulators step in.
Now is the time for these companies to start giving back, really give back. I read an argument that AMZN should consider Detroit for their second HQ, to revive that city, and several more examples can be thought of (be proactive in paying some tax, maybe?. Since 2008 Walmart paid 64x more taxes than Amazon).
I think these guys are really more scared of the EU. If the EU really steps up their regulation, and at the same time the FANGs start giving back in the US, it will be interesting to see if this leads to friction between the EU and US, defending their new national champions. Trump on the barricades with Zuck, that will be the day!