I saw this about putting money in a parking meter that is not yours. I can see two arguments for it.
If the person knows there is 1 hour and overstays, they are taking a spot another person may need
If you see the ticket writing on the way, popping in a quarter can save someone a hefty ticket.
What would you do? I'd be inclined to drop in a coin.
The Parking Meter Paradox . Putting money in someone else’s parking meter is illegal in most places. It’s an example of laws leading to unforeseen consequences. One user believes the original law was designed to prevent tampering with someone else’s parking meter to force it to expire later than planned.