Parking tickets are hated everywhere in the world, it’s a known scientific fact. It’s common courtesy to inform someone who’s sitting in their car while it’s running that they could receive a ticket, and give them a chance to comply. If you’re this brazen parking enforcement officer, you just march right up to their car and stick a ticket under their wiper blades while they’re still inside, give no explanation and then dip out.
Their reactions are priceless. From foaming at the mouth, to smiling and feeling like an idiot. It’s amazing how $5 and a kind note can lift someone’s spirits. You just have to trick them into thinking they have to pay a fine first.