Animal repellent, available in many stores and online, works very very well in this situation. Spray and leave. They will not be able to do anything. If you want to inflict further damage, and there's no witnesses around, a person with spray in their eyes can do very very little to defend themselves.

Oven cleaner works good too, but the cans are a little bit larger to carry.

If you think that the ones enforcing this stuff should be punished even more severely, you should carry a knife as well. Be careful not go get yourself dirty.

This shit is never going to stop unless we put a stop to it. If every enforcer has to take a 1 in 20 chance of being destroyed every time they write these fines, then they will quickly stop.