But surely the point is that it is a parish staithe and therefore public moorings aren't they? I agree that if people use moorings infront of a pub, then they should certainly use that pub's facilities. However, the moorings at Womack are not part of your frontage, and indeed totally separated from your plot by the dinghy dyke. The shop you occupy was built there to take advantage of the staithe, not the staithe put there to service the building.
Whilst can I fully sympathise with your frustrations, there is nothing stopping boaters spending 24 hours at a parish mooring (as long as they pay their fee of course), and I am sure the thought that they may be stopping potential customers coming into your shop by doing so doesn't even register.
It is no different to when this very forum held their birthday meet on Womack Staithe 4 years ago and basically took over the entire moorings, had a massive BBQ and a great day. True, there wasn't a shop other than Darren's small offerings there then, but even if there had been, I'm sure the consideration it could be hitting trade would not have been one that the meet organisers (of which I was one) would even have thought about.