One thing to keep in mind is that your average person probably doesn't have access to HAM equipment. It's not like cell phones or even CBs, where the equipment is highly prolific and easy to use/understand. Plus it's not like it's exactly popular or 'in vogue' right now.

Therefore, most of the people with the equipment and the know-how to use it are going to be licensed HAMs who wanted to be licensed HAMs. It represented a significant expenditure of time, effort, and money to them.

While there is always a few bad apples, most HAM operators understand how to operate and won't knowingly risk their license.