With all the above in mind huck, I probably would have held my course, dropped the engine and started it, and kept a close eye on the lobster boat until I could better determine what he was doing...section deleted...getting to know each other face to face.Maybe start off by Letting them know that you tried to get out of their way, but weren't sure how best to do that...? See how it goes from there, keep it civil.... at least you'll each get a sense of who you are dealing with.
Very well said, and I believe, the proper course of action.
My mindset when I'm sailing and encounter a working boat, be it a fishing boat or tanker is: "He's working, I'm not....he shouldn't even have to think about me" (even though he may have to legally).
Not only is getting in pissing matches on VHF 16 illegal, it is counter productive and always makes the participants sound ridiculous.