One thing I wish everyone writing about privacy tools would realize is that if you create a tool that's safe for political dissidents, Nazis will also use it. If you create a tool that safe for anarcho-capitalists, socialists will also use it. If a tool's 100% private, anyone by definition can and will use it, and if you put in a backdoor to keep out or keep up with that one group (whichever one), it'll eventually be used on everyone.