Re: Mooring ball too close?
Many, if not most, mooring systems use a length of heavy chain attached to the mushroom or block, the end of which is then connected to the line that goes up to the mooring ball. The chain lies on the bottom, and if it is pointed in the direction of your mooring, it effectively moves the ground zero for its ball closer to your boat. (But once another boat is tied to that mooring, that boat's mass is enough to drag the chain on the bottom away from your mooring.)
This happened to me, and when the mooring service came to fix it, the guy just picked up the offending ball and dragged it away from my mooring. Problem solved.
Joe - currently boatless