Unless there is a way to prove the alt is 'your' alt, I agree. If we could solve the key rotation problem at have it still work with their method of key rotation then maybe it would suck a lot less.

#WoT fixes this

Again, from an engineering perspective, no it doesn't. Grandma doesn't know what that means.

trust isn't an engineering problem. neither is identity (or pseudonymity).

Yes but having things 'just work' is. It all has to happen behind the scenes.