No personal spawned vehicle within proximity of boat = no boarding boat = a method to at least prevent/deter teleport exploiters from instantly getting to places where the game made you to find by driving
Proximity range in meters, studs, yards, whichever units you prefer are open to feedback
(yea I hear you talking about what if they don’t spawn a vehicle? Quite a loss I might say since it was made to drive around and find the boat???)