Dear person outside gently honking your horn,
Stop it. I don't have bricks, but I swear, I will fill a condom with a liter of water and throw it at your car. Or something like that. If you're going to honk, frigging honk ONCE, loudly, so the person you're trying to pick up hears ya. Don't sit there, poking lightly at the horn and do it 40-50 times over the span of 5-10 minutes.
This is as bad as annoying car alarms going off. 'cept this is someone actively doing it.