I suppose that these rules could move someone from "creepy" to "extremely awkward", which is probably an improvement. People never say no to "Would you like to talk to me?" or "You look kinda bored, do you want to continue this conversation?" (unless they take the latter to mean "I'm bored, go away").

Refusals are always at least a little rude. True opt-in forms use implications (things like "I like bowling, too bad my friends don't" vs "Want to go bowling?"), but they require social skills to generate and understand.