As I actually live on Winter Harbor, I thought I'd chime in.
In addition to a
huge part of the boating public out on the water, we experienced a perfect weekend that included very strong winds. The narrow part of Winter Harbor being discussed is very well protected from strong winds, so it would be a natural location for the public to anchor. This "crowding" issue may come up on occasion, but only on the weekends where weather is a factor. (A sudden storm is another matter).
BTW: Family members were yelled at in the same location. They'd been picking blueberries from their boat along the shore—and at all times they were within "The People's Lake".
(But I'm not defending their activities).