The closest I ever came to seeing blows exchanged on the docks was when a large sailboat was getting a new genoa
fitted and a power boat
across the dock
and upwind put some chicken on the bbq. I don't know what was on that checken but the resultant smoke came pouring off the bbq as thick and gray as could be. It went directly from the bbq onto the new genoa
covering it with grease and soot. A few tens of seconds later there was much shouting and running around trying to get the sail down and the smoke to stop. When the smoke cleared
there were three guys and a women standing on the dock
repeatedly shouting phrases at each other like "how could you be so stupid", "it's against the rules", "the sail is ruined", and of course "who's going to pay for the damage?". As interesting and entertaining as all this was, I had other fish
to fry -- up at the marina supplied gas bbq.
All that being said, their are a number of boats on this dock that bbq almost every night. However, they don't have any other boats downwind of them and they use gas bbq. So, as in all things associated with living in a marina, be considerate of your neighbors feelings, space, and property.