I am not there to provide entertainment for passenger amusement. The same would go for any external video cameras.
I understand why you wouldn't want yourself being listened to, and that's your choice - but external cameras - why? Do you also ask your pax to close the window blinds at all times?
Ignorance is bliss.
Depends on the individual. My way of coping with bad things (should they happen) is that I like to know as much as possible about what situation I'm in and how bad it is, such that I can plan a decent way out of it, if at all possible. I don't like to stick my head in the sand. I am aware opinion is polarised on this, however...