but at the same time, there a very large number of bad instructors, and the Dive Industry wants to think it can "police itself" without any police or deterrent...
"The only thing necessary for the triumph of evil is for good men to do nothing." - Edmund Burke
If you see a dangerous instructor and don't report him, you are a part of the problem.
FWIW, I don't feel that a bad instructor is simply one that does not teach like I do. I teach a non-traditional method of trim & buoyancy first, never allowing my students to kneel before we go on to the more traditional skills. If the end result is a student with a modicum of situational awareness, trim and buoyancy then I think you're just fine. If you're abusive to your students, spend more time talking about your tales of daring do than diving and/or don't require trim and buoyancy, then I think you're doing the sport a disservice. That doesn't mean I think you're dangerous, and that's what we're talking about here. There's a huge difference between incompetent and dangerous. In fact, a competent instructor can actually be dangerous.
I've made two complaints about standards violations/safety. Both to the regional rep for Florida and asked him what should be done. One of those times, he simply shrugged his shoulders and said, "I'm glad they teach more for other agencies." No, it wasn't PADI. There's one other instructor I should have reported and didn't. It was while I was just a DM and she purposefully brought OW students into an overhead environment. Her reasoning was that they were safe enough with her. My issue was that she taught them a dangerous, dangerous precedence. I regret that to this day. None of us are perfect, not even the most vitriolic on SB. Report standards violations as you see them. If a picture is worth a thousand words, then a video is worth a million. Get it to the right people and hopefully you won't be brushed off, like what happened to me. You are the eyes and ears for the agencies. Think of it as Scuba Crime Watchers. If you don't, please stop bitching about what the agencies aren't doing. As far as I can tell none of them are pro-active. They all rely on incident reporting. They all rely on you.