I dont know that I would say anything. If you do you may end up banning it for everyone, including yourself. Just fill in holes when you are around and keep an eye out. If someone is leaving holes you may or may not eventually find him. Try putting an add out for a part time MD buddy or something(bullitin boards at your post office, grocery store, and so on). You may get a response, you may not. But try other options to find this person and educate him. How you choose to educate someone is up to you. If the problem persists, then you have a name and other info to provide to the local police or something. I know its not your job to fill in holes, but if someone doesnt do it, it could and eventually will cost you MD locations.