John..in principle I am with you...but the reality is that there are a lot of low-life derelicts out there hanging on anchors. They don't pump out. The smoke coming from their boats ain't all diesel and it ain't tabaccy either. The boats can no longer move under their own power and the rest of us need to lock everything when we pull into an anchorage and leave the boat.
Somehow...that does not seem to me to be what the intent of "anchoring rights" is...but it probably could be handled with other laws if they were enforced. But it is easy for towns just to use a cannon instead of a fly swatter and not worry about it. Thus we all get caught in the explosion and need to fight back.