I like to sail and my 13 yr old son loves paintball, So...........

Boat crews are armed with paintball guns, when all crew members are
shot, game is over. A shot member cannot shoot anymore or help sail.

Imagine the strategy that would evolve:

Bow raking would be inneffective cuz crew would hide in cockpit behind
cabin.
Stern raking would work well.
A boat being pursued would want to stay in the jib shadow of the
pursuer cuz the pursuer could only shoot from his cockpit while the
pursued could concentrate his fire there.
Two boat approaching each other across wind, the boat with "Weather
Gage" would have advantage cuz he would be shielded by his jib..

Possible games:

Fleet actions
Blockade runner where a single boat attempts to make it past other(s)
into port.
Small boats like Lasers or Sunfish could be "Gunboats"

I am going to test on an old sail to see if paintballs stain sails.