Licensing and regulation (such as the regulations against jamming) does not stop anything, just as no regulation or law stops anything. It is peoples choice of adherence to those laws or regulations that stop or control things. Anyone can choose to ignore any law or regulation, the presence of the law does not prevent that. However, the law does tend to say "if you do this society will view it as wrong, and potentially punish you for it, assuming you are caught".
These are societies rules. Most rules are a history of what has been done wrong in the past, the rule did not exist, people caused problems related to the regulated activity, and so a rule/regulation was written to codify what is acceptable. In a perfect world there would be no need for rules or regulations, and people would act with intelligence, kindness, and courtesy towards all others...but this ain't fairy land. If you do not agree with them (rules / regulations) then you can attempt to change them, there are procedures in place to do so. The other alternative, assuming you do not agree with a regulation, is to ignore it and do what you want. However then you must be prepared to pay potential consequences.
In the case of jamming, agitators will agitate. You appear to think it is because of other peoples actions that jammers jam, you pretty obviously have not observed much along these lines. I have repeatedly seen jammers jam anyone attempting to talk, regardless of who it is or if they have ever been on that frequency before. The perceived anonymity of radio communications, like the perceived anonymity on the web, can sometimes bring out the worst in people. I have known many jammers to be in it for the shear want to raise a response. They don't have to know who or why, just as long as they get a result. Jammers tend not to jam because of other peoples actions, but rather because of their reactions, and the jammers desire to make that puppet dance, and trolls troll for pretty much the same reasons.
T!
