ROFL you think the coast guard has slowed illegal drug smuggling? You'd have to be the biggest moron on the face of the planet to believe illegals don't come by boat. The biggest moron on the planet. I lived in South Florida. I still visit South Florida. I spent a lot of time out in the water. I used to listen to the planes fly in dropping mj bales and cocaine in the everglades when I lived in corals springs. I'd watch them pick the stuff up with air boats and such as we fished out in the glades. ROFL... Some get caught but it's a small small percentage and more for show than actual security.
The US has 94,000 miles of coast line. Florida has over 8,000. Bringing in illegals and drugs in by boat would be no problem. Unless law enforcement is tipped off, the chance of being caught has to be very small. The only problem with bring in illegals by boat is the cost. About 10% of illegals do enter the US by boat.