Here in Zealand we've a pissing law that dates back to the 18th century that states that if we must go in public, if at all possible it is acceptable to go on the rear left wheel of any parked and nearby wagon.
So basically you can have a piss on the rear left tire of someone's Camero if you have to go bad enough. XD
The law here is basically even older than that. It states that "If a person should not survive the urination on or at a specific object, be it because of a lethal application from another person(s) or of other means (electric shock, avalanche, bear attack), then he/she was probably not OK to go there".
Ha ha! A smart ass way of saying 'If you have to go, go but use enough common sense to not get yourself killed in the process." XD
Since when is somebody's private property considered public?
From my understanding everything outside of your property is claimed and owned by someone else.
Quite frankly I don't think most people would expect someone to critically injure themselves by retaining urine just as long as the spot to piss shows sound judgement and discretion.
That guy in Florida - That's what we would call a setup. Someone wanted him out of the way for some other reason and grasped at straws trying to find any way they could to incriminate him.