That could be, but I actually think these kids were much smarter than that. If they are going to be found alive it will be like the second grade teacher above...floating in their boat due to engine trouble.
When I was 14 my buddy had a boat similar to theirs and we took that joker just about everywhere. The only places I don't remember taking it, just reflecting back, was off shore where we couldn't see land. Now, if there was a Bahamas 40 miles offshore, we might of done that.
Speaking of, how far away is the Bahamas from where they fueled up?
Was the boat equipped with GPS?
Was there mention of any major storms that came through that day?
If no storm or gps/radar, I bet they missed the island and ran out of gas. Wouldn't be surprised if they end up on a key like Tom Hanks from Cast Away.