It’s Saturday and the courts are closed. You park in a car park I own.

I have put up a sign saying I can instantly crush any crossover vehicles I like, as I consider them ugly and lacking in character.

As I load your car into my crusher, you dispute the legality of my sign. But the court is closed until Monday, and the sign says I can crush your car instantly, no waiting.

Should I be allowed to crush your car today? Or should I have to wait until Monday, so the disputed legality can be resolved?