bob
It's better to have two hands than one glove.
... If the cops were called, I would explain the situation and I would imagine the officers would understand my situation.
No, they would not. Police deal in criminal matters, such as your vandalism. They are unconcerned with civil matters, such as any claim of non-payment you might have. Since there is no such thing as a title to the work in question that is recognized by the apparatus. Any claims of ownership and/or non-payment will not mitigate the crime you're committing. You'd be in custody in a heartbeat.
All those posting the various acts of bravado they would perform are either ignorant or idiots. Are you willing to hazard your freedom for a few dollars? Especially for a few dollars you will not have a hope in hell of ever collecting?
Living well is the best revenge.