I have an idea.

Get on a unicycle... and ride it past them. They may try to ticket you, but a unicycle is not a bicycle. It is not a vehicle. So you can ride it on the sidewalk. You can ride it just about anywhere a person can walk. However, if you ride it on the road, you maybe jay-unicycling..... I don't know if there is a ticket for that one... lol =)

If a sign says " you skateboarding, rollerblading, or bicycling " .. you can still ride a unicycle there... because it is none of the above.

Just rub it in their face.