There should be some kind of option where people can't find you through search. Only through your land objects, objects created by you, friendslists, and other things like that.
And also some sort of mute where if the person is on your ignore list, they can't see or hear your av in chat or on screen, but maybe in return have it so you can't do anything back to them because of course that'd be abused if you could. Like a ghost mode type thing, I don't know.