Well no because some people early in their transition cycle might have their gender confused by someone who doesn't know, whereas no one can accidentally go "oh shit sorry I didn't know you were black?".
As long as the person is polite and apologetic without being patronising I think it's okay.
Yeah I read a theory like that, something along the lines of you could not actually have existed until .3s ago but you were created with all of your current memories and experiences
You can change how often it deletes history items, I'm sure I've done that before