Some may not like my advice. It is to keep out of it unless something directly affects your own safety. The reefs?--just imagine how many jerks are messing with them in the Caribbean or worldwide. Getting into an argument with divers or instructors won't do anything to help the overall picture, just get yourself in a mess. It's like asking someone not to smoke near a outside near a door while looking at 300 butts on the ground.
A better approach to help the reefs may be to join an organisation fighting agricultural runoff, mangrove destruction to build hotels/condos, global warming, etc.
Although you don't read much about poor diving technique, kneeling, etc. in Florida, there have been countless threads about incredibly poor "vacation" divers in the tropics. To effect change in helping those reefs, it would seem that whole mentality would have to change. Doubt it will.
I learned a good lesson about DON"T TOUCH THE REEF on one of my first open water dives. I was in Cozumel, just certified with my daughter and on our second dive+-. There were 7 diver's in our group including the dive master. Another group had descended near us and we let them get ahead. I was just taking in the wonder of the whole new picture and keeping an eye on my Nemo daughter when our normally low key dive master shot forward and grabbed a guy in the group in front and dragged him off the reef. When we finished the dive and were able to talk on the boat he said he had signed the other groups DM several times that his diver was holding, finning, breaking coral and finally lost his cool. I probably would have had a heart attack if someone had grabbed me like that but it was a great early lesson and have always tried to be a conscientious diver since.