Anchoring in Eustatia is banned I believe by all charter companies.
I don't think The Moorings bans it. They mark it as not covered by your insurance - just like they do for Anegada - but it didn't look to me like it was actually banned. I tried to get them to tell me where I couldn't go and never got a clear answer.
I didn't go there this last trip but I was thinking about it and was thinking about it a little more for our next.