I've been a trainer in the photographic industry for a very long time, initially as an instructor on photo lab equipment. We were dealing with some potentially dangerous chemicals that were very safe if you took the proper precautions. That included wearing personal protective equipment (PPE) whenever there was a possibility of coming in contact with the chemicals. I knew a lot of other trainers that would insist on the students in their classes wearing PPE, but when they themselves were demonstrating chemical handling never wore them. They would inevitably explain that they had been "doing this for a long time," or "a little won't hurt you," or some other garbage excuse not to wear it. But they would insist on the class wearing them every time. May times I would find myself visiting one of these stores and witnessing them completely ignoring the safety (and OSHA-mandated) protocols. When I'd ask them why they weren't protecting themselves, they'd say "The trainer didn't wear this stuff, and he said it wasn't dangerous anyway."
My point is, you can tell someone about a safety procedure until you're blue in the face, but if you aren't willing to follow the same precautions, EVERY TIME, WITHOUT EXCEPTION OR EXCUSE, then all the disclaimers in the world aren't going to get any message across at all.
The expression "Practice what you preach" is so true, isn't it? It's a lot better guide than "Do as I say, not as I do."
Something to think about.