I'm not sure how one would deal with this. I recall similar situations growing up around people that were audiophiles. They'd start out with a lot of misinformation and bad habits but they'd grow out of them in time as they learned. You are dealing with adults though and that makes it a different issue. I saw this transition from what I'd consider mostly superstition to more rational thought among audiophiles without really doing anything, they came to it on their own with research and experience. Maybe that's what you'd need to do, encourage research and experience to overcome the superstition. You can say something is true and no one will believe you, show them something is true and it will be much harder to dispute. How this can be applied in your case depends on the specific issue you are dealing with. That might dispel some of the technical myths they have. When it comes to more "cultural" issues that's another animal. They are not likely to abandon the friendships they've made over the radio. The bad operating practices (and even outright illegal behavior) might be best dealt with by turning a blind eye to it. You might be able to break them of their superstitious behavior by example and experimentation but if they keep going back to the CB for the conversation then I'm not sure that's a habit that can be broken. It's hard to condone illegal behavior, or convince yourself of being blissfully ignorant, but you do have to live with these people. If what they are doing is obviously unsafe then that's something that must be dealt with as diplomatically as you can. I suspect that their personalities might not be compatible with Amateur radio. I don't know these people but by your descriptions I doubt you'd be able to convince them to get a license. What I suspect you could do though is break them of some bad habits.