I think it is really stupid, but on the plus side, those gators are captive and can't harm others who have not made a choice to put themselves in danger. It is illegal to feed wild Alligators in Florida for the same reason it's illegal to feed wild sharks in Florida. If you wrestle a captive gator, you put yourself at risk. I have no issue with that. Go for it. If you feed wild gators or wild sharks, you put me at risk as well. I do have an issue with that.
On a one-to-ten scale, aren't the fishing piers and marinas the ultimate shark feeds? It seems to me that scuba feeds, typically conducted at semi-remote locations and only intermittently are irrelevant compared to the constant smorgasbord of fishing charters motoring through an inlet tossing fish guts over the transom or anglers hanging over the edge of piers chumming the water next to a beach from sunrise to sunset.
The association between scuba shark feeds and attacks on humans - divers or otherwise - seems extremely tenuous. I understand why people would be revolted at the idea of a shark feed but hypothetical nature porn hysteria (gotta love "Shark Week") is more of a problem than all the various shark feeding activities combined.