Irrelevant of the channel or who is in charge or owned the boat, 50 miles and hour at night is just reckless.
You and I know that (and probably everyone reading this). But someone who doesn't know that much about boats, who goes out with someone that they THINK is an experienced and responsible boater, might very well not know any better. They are going to believe what they are told, and if they are told "Don't worry, I know what I'm doing" then how are they going to know any better?
Again, clearly the operator of the boat was irresponsible. I am not going to judge the others on-board, though.
Plus who is sober at 3 a.m.?
Me. I could give you a list of other names, too, but they wouldn't mean anything to you. Fishing at night is a very common thing. Any given night there are dozens of boats out in the Gulf, or Tampa Bay, that are fishing. 99.9% of them are being operated in a perfectly safe manner, by people who are quite sober. I have no doubt the same is true off the coast of Miami.
Of course, I can't say for sure that was the case here. Maybe not. Probably not, I guess. Still, just because they were out on a boat a 3am--that by itself is no kind of evidence at all that the operator was drinking.