The first ask is almost never the real ask.
Predators rarely open with threat. They open with a role the target already knows how to answer: the helpful stranger, the authority figure, the friend of a friend, the person in a hurry who needs one small favor.
That first favor is a compliance test — small enough to feel rude to refuse, large enough to move someone one step off their usual path.
If you only keep one line: politeness is not a safety strategy.