Yeah, not a lot of Protectrons in Fallout are "nice" For the reason that they try to disintegrate you with there laser. So, imagine this
"
rotectron: Tickets please.
erson: Here you are.
rotectron: Tickets please.
erson: I just gave you my tickets.
rotectron: Negative, sir. Tickets please. Person: I just gave you my tickets!
rotectron: Alert! Alert! Hostile enemy detected!
erson: No, wait! I-PSSSHHHH....
rotectron: Tickets please."