Operating from the perspective that what TPC saw and reported is an accurate description of what happened, I think his conclusion that these operators were inder the influence is plausible.
It is much easier to beleive that people doing stupid things, like driving like idiots, etc, are doing so because they are under the influence, not because they are simply stupid, self-centered and self-indulgent jerks.
Sadly, the truth is that many times, they are all of the above, and under the influence.
I agree that he should have called the cops. He now agrees that he should have called the cops. I understand why he didn't, but I bet it doesn't happen again.
Chasing down people behaving like this while one's family is in the boat/ water isn't necessarily wise. Generally, if they are doing shit like this it is a part of their character. That, at least, was my experience.
AHhh.......couldn't have said it better myself. Some one with some common sense.