It would be nice to know which marine
police agency was involved. Presumably, the MD DNR police is a state agency and there are probably other county and perhaps municipal law enforcement agencies in the area that have marine
contingents. Maybe B & E will respond.
It would also be nice to know what the policy is of these agencies when acting at the behest of a landowner vis-a-vis an anchored vessel that is not otherwise violating any laws/regulations. In this case the vessel had already planned to move on, and it looks doubtful they could have been required to do so by the marine police, but boaters shouldn't have to be concerned about such intrusions, no matter how polite.