In said US of America, when the government wants to know something about you, they will get everything they want from the companies - it's even written clearly in the US laws. So I'm not sure why (or where) you draw that line...
2. I use a VPN and pseudonyms. they could unmask me if they cared to, but it'd be annoying. it'd be a lot more annoying if they wanted to unmask every VPN user all the time.