What a racist prick. "You people are like vultures"? What the f**k is this inbred hick talking about; he's a commercial fisherman - if anyone's a vulture, it's him.
The problem with this whole sad affair is that it might not be illegal. The only thing I think that might be argued is that he used his boat in an intentially intimidating fashion.
We have had a similar problem recently in NZ.
Diver run over by a glass-bottomed boat - National - NZ Herald News
Run over at Leigh - The Fishing Website Forums - Page 3
A well-known glass-bottom boat tour operator hit a spearo I know (who had a float & flag), boat tangled his float line, he got caught in it and dragged towards the boat, his forearm broke when the hull hit him (defending himself from the blow). It was very sad case of "it was bound to eventually happen" because this guy has had multiple complaints laid about him before by spearos who he had almost run down (law are: not allowed to travel faster than 5kts within 200m of land, not allowed to travel faster than 5kts within 200m of a swimmer - spearos in NZ are classed as swimmer and not divers because we spend more time on the surface). Anyway, the Maritime Safety Authority could never previously do anything about it because nothing "bad" had happened previously. So now something "bad" has happened and now MSA are doing something about it. The spot is ridiculously popular with spearos, and this guy knows it; he just doesn't care. Anyway, I hope the book gets thrown at him, f**king prick.
Boaties often come up to me; typically they are being cheeky pricks and they think my float is a lobster pot or something and want to pull it up. When I'm attached to it they get a shock and piss off quickly. The problem, as Choker says, is trying to surface safely. We hear the boat, and sometimes we can see the boat u/w. I generally suface with my gun first (as Choker did) in a vain attempt to be seen (I don't think this actually works, but I feel better about it).
In fact, last month I was driven up to by a lobster potter up in Howth. I was diving on his pots (for a look; not to take - but you'll have to take me at my word), and he did come in slow and give me space, whilst trying to protect his pots from this "vulture". It was easy for me to verbally disarm the grumpy old prick, but that's less easy if English isn't your first language.