Teaming, mingebaggers delight, they sit around and mingebag, then jump on YOUR boat...
Suggestion 1 - Make a new feature so that if a minger gets on YOUR boat, they slowly start dieing like in the water
Suggestion 2 - Give each boat owner a tazer (or stun stick) that deactivates use when they are off their boat, but if a minger jumps on your boat, you can use your tazinator to give them two options... GTFO, or die :P
Suggestion 3 - Leave it alone, so that mingies can go on unpunished...