As strange as that may sound, it's true in China.
In China, they came up with a wonderful idea to get everyone have a fair go on the benches. SPIKED BENCHES.
Over there, parks are usually crowded, and some get there during the early hours of dawn and hog the seat for themself. This is hardly fair for the others, so they made a contraption where if you don't frequently pay the bench, it makes needle shoot out of the seats.
Don't believe me? Go look at this:
That might hurt a little bit. Makes you wonder why you didn't think of it first, eh?