Discussing the poor experiences of some DSD/Try scuba participants can to lead to a rathole of other topics.
I support DSD/Try Scuba experiences as you can draw in people who didn't plan on diving at all, and do it on a whim. Provide quality equipment (should be a no brainer, but we all know this isn't universally true), don't rush (again, should be a no brainer) so that people are relaxed and enjoy themselves, and don't use these experiences as a loss leader.
Just like there are many poor OW classes that cause people to quit before they've started, there are going to be a lot of poor DSD/Try Scuba experiences that will drive people away from getting certified.
I have no idea how to fix that. Or I should say, I have no realistic idea on how to fix that.
I've seen some videos of some pretty incredible stuff. This 18 year old instructor in a BP/W as well as his 4 participants, backfinning monitoring the participants (though as always, if there is an incident, you will see you don't have control of the participants). But this instructor did his homework. Got the participants properly weighted. Not sure what he did to ensure his customers were all comfortable in the water (my guess not much was needed), but it appeared to be a good example of what makes up a positive experience.
I think a better discussion should focus on how to improve the DSD/Try Scuba experience (what to do and what not to do).
One thing is for sure, when providing DSD/Try Scuba experiences, a dive center needs a wide range of masks to ensure a proper fit for each customer. An improperly fitting mask is just asking for trouble.
Not sure how I feel about SNUBA. But I'm dead set against doing away with these experiences. If done properly, they are a great offering in the dive industry. But that's a big if.