There are a lot of people with more money than brains. I've seen some fairly decent sized boats behind things like BMW X5s, Porche Cayanne's etc. I just steer clear and get away from them as soon as I can.
Yeah, it can get scary out there.
When we were up at Tahoe, there was a guy in an Acura MDX (Honda Pilot) trying to pull his 19' Bayliner out of the water at the Camp Richardson ramp. It wouldn't budge. The tires wouldn't/couldn't even spin.
To his credit, the ramp was a combo of concrete and beach sand, but certainly do-able in a true tow vehicle.
After being entertained for about a half an hour, a guy in a Dodge 4X4 with the Hemi showed up and pulled BOTH the Acura and the (still hooked up) Bayliner out with ease.
It's amazing what a truly designed tow vehicle can do...