Think of it this way. If I came upon you mding on city property while I was on duty I might politely ask you to point out some spots where had previously dug. If I saw that you were doing your do diligence and treating the property with respect than I would wish you a good day and be on my merry way. The problems seem to arise when someone spoils it for all of us. Cities can't be blamed for making laws stricter. It simply comes down to money. It's easier/cheaper to ban something outright than it is to ensure compliance.
Excellent input. And I/we totally respect your job as an LEO. Very stressful job that I would not trade you for the world !!
1) yes, if an LEO on duty comes up and alerts any of us that they feel this violates a catch-all grey area law/rule, then yes: You, as an LEO, do have the ability to interpret, in-the-field, to fit situations that may arise. And then yes, the citizen is obligated to obey the cop. That is understood. Same can be said of noise ordinances, blocking sidewalks, etc.... You , as an LEO, are tasked with keeping civil order, and yes: you have latitude and authority to get your job done. And yes: the md'r should comply . If he REALLY had an issue, he can ask for a ticket , and fight it. Or whatever. But sure: citizens should pay respect for cops with a tough job.
2) And yes: If the md'r were obstinate, leaving a mess, can't give lip service and respect, ... then SURE: the issue could "blow up" (as in the picture you paint) leading to "no md'ing rules". Granted. However.....
3) So too has there been cases of well-meaning persons "seeking permission to md" (in places with no specific prohibition), that led to "no md'ing rules" too. Whether by actual implemented written rules, or the mere answer of a "no" (which would be on par with "law" or "rules", would it not ?). And this has happened in places where it was never an issue prior to that. Or strangely, one person gets a "yes" while another gets a "no", and so forth.
Hence my thoughts of "look it up for oneself".