I hate getting parking tickets, so I sat down and thought of a way to get around it.
When the parking wardens come round, they mark the front tyre closest to the curb with a chalk mark. On their next round, if the chalk mark is still there then they dish out a ticket.
A modified automatic fragance dispenser that are used restrooms can be used to solve this problem. Instead of frangrance, it dispenses a black liquid (or similar) on to the top of the front tyre. When you park at a time limited park, you flick a switch and every 30 minutes or so the unit would fire and the chalk mark would be erased.
The result is free parking.
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