also i got seen by a work-bum once in one of my spots. he saw i was filling around the numbers. he said dudes painting over the numbers leaving cans in the yard for workers to trip on and pornographic art were the companies only major complaints. and that most workers will turn the other cheak if you abide but some will hit you with a wrench if they see you in the yard let alone painting.
he was cool for a workbum.