And the divers have no defense because? The divers surfaced within range of the fisherman, this does not mean they set up in range....
And what charges would you "find"? The article states that two divers surfaced "nearby" when the fisherman threw a jig twice at them. The fisherman comitted a battery, the divers were victims.
The fisherman's misdemeanor battery was not comitted in the presence of law enforcement so the ordinary course of events would be to send the victims to secure a warrant. Of course this presumes ordinary jurisdiction on the part of the State of Florida, depending on how far out the wreck is, it may be a moot point.
And any law enforcement officer who "finds some charges" is looking at a malfeasance charge of their own.....
Plain and simple, if a diver is going to get pissed when a fisherman shows up and starts fishing too close to their dive buoy, then for a diver to enter that zone on an already anchored fisherman is grossly wrong. You read the article as some divers set up out of range and then accidentally ended up at the edge of the fisherman's casting range. I read it as a fisherman was there doing his thing when a couple divers showed up and dropped into the water within the fisherman's safety range. There's a lot of wiggle room to imagine the circumstances.
I also suggested that the divers are responsible for their position in the water. It wouldn't matter to me if they set up too close, or just surfaced too close. If the divers accidentally surfaced close to his boat, waved or otherwise acknowledged that they had screwed up, and began an effort to get back out of range, then they deserve a little slack and may have just been under-skilled. If, on the other hand, they set up close to begin with and then sat there playing on the surface, or maybe were flipping off the fisherman, then they earned their reward. The article doesn't specify how close they anchored, how close they surfaced, or what other actions were taken by either side.
As far as charges go, if there is a violation for a boater entering a diver's range, then the same violation should work in reverse when the diver creates the dangerous situation. If no one was actually harmed in this incident, then there's no reason why the people inappropriately initiating the contact should be able to then put the guy who overreacted in jail and walk away laughing about it. Again, there's a lot more fact left unknown to make a final determination. There's no doubt that law enforcement can, and does, use judgment and the possibility of charges to incent parties in a dispute to be reasonable.
As a diver who knows there's someone fishing nearby on the same wreck I want to dive, I think I need to use a line to go up and down or otherwise take steps to stay out of the fisherman's range to ensure my own safety. I might even try to communicate with the fisherman in some way before going down to make sure we both know what's going on.