It happened to me at Cane Garden Bay. A Tradewinds 57 ft crewed boat anchored in middle of mooring field . I was at grocery store and returned to our boat with my wife tending to fenders... Wind had changed and backwinded the anchorage. Only then did I realize the offender was anchored. When I asked why they anchored in the middle of mooring field, the mate responded that they were "too big for mooring ball"... So WTF do you anchor in the middle of the mooring field?

Video the offender and then discuss. Video comes in handy when damage occurs. (Fortunately the offender pulled anchor and moved)