nippurmagnum
Contributor
Actually, I am very aware of how they do things. I have been almost every year since the whale shark excursions began, first in Holbox and then migrating towards Isla Mujeres. I skipped a couple of years for various reasons, including the issues I described in my original post. I decided to go again last year because I was invited by an op and I had friends visiting who had never been. I was hoping I would see changes, but it was only worse, and it has gotten worse every year. If you would have seen how it used to be, you would see the difference. If you knew how many sharks are injured by propellers every year, you may have a different perspective.
I now liken the whale shark excursions to the Dolphin Discovery "experiences" - they may be in the wild, but their habitat is incredibly disrupted by disrespectful humans.
I don't doubt that it would have been better when there were fewer people. But the thread was started by someone who asked whether it's worth going at all because of the new life vest rule. And my two cents is that it's still very much worth experiencing.
One thing I forgot to mention is that there are some operators who will leave the dock two hours before the other boats (and charge a little more), so as to get to the whale sharks before the big flotilla of boats. I did that with Solo Buceo, which leaves at 6:30 am: Swim with the Whale Sharks Cancun | SoloBuceo.com. But I don't know that this would address the concerns you expressed, because the overall effect of boats leaving earlier is that it increases the total time that boats are around the whale sharks.
But FWIW, I don't think the whale shark excursion is really comparable to Dolphin Discovery, because the whale sharks are not captive, and they are not fed or trained or interact with people (other than by proximity). And most importantly, the whale sharks can (and do) dive down if they are feel harassed. But I will certainly grant that it's far from a spontaneous encounter in the ocean.