To compare walking into a florist shop and removing a flower arrangement to parking on an unprotected vacant lot and implying that something is being stolen is ridiculous, moronic and retarded. In civil law a claim for damages must be substantiated by showing what damages have occurred. since the lot was not open for business, and since there was no competition for spaces (i.e.) the parked car is not displacing a paying customer, and there is no protective fencing around the lot to stop anyone from parking there, it would not be possible to prove in a court of law that any financial loss occurred. Punitive damages are not allowed in small claims court (which is where a ridiculous case like this would be adjudicated), only actual damages. Since there are no actual damages the case would be dismissed as being without legal basis.
As to the fact that they have been doing this for over 40 years you're lucky that you didn't get caught any sooner.
The posting above by D. Neal is so stupid and nonsensical that it is beyond the comprehension of a reasonable and normal person, for any of that to make sense, you'd have to be crazy!
Wow! what a dope!