All domais .com, .net, .xyz, pw can be easily seized, when you are a big fish.
If you want privacy and security you should look at ccTLD domains, not .com and .net
.com and .net works fine when you are small fish, nothing will happen unless they report you.
ccTLDs domains: .ru, .su, .is, .cr, .to, .se, .co are currently the best.
Where to buy these ccTLDs domains?
Njal.la
Cheapprivacy.ru
Flokinet.is
xuid.ru
.ru domains required ID passport, but ify ou use cheapprivacy you don't need that. Is anonymously (never used them before).
Njal.la is safe and flokinet, others I don't know.