We raise a rather slippery topic here.
audioguy58 parents ought to be able to go to a judge, petitioning the court to allow them to impose a chastity belt on their son or daughter. If the judge granted their request, the arrangement would be unequivocally legal.
I suspect that in almost every country there is a legal possibility for parents to apply to the court for a minor's obligation to have a specific behavior (in this case wearing a chastity belt). Of course, with a high degree of probability, the court's reaction will not be favorable to such a conclusion and will end with a limitation of parental rights, and not the child's obligation to wear a belt...
Raziel Someone who supports chastity would have to work hard to become a politician and bring up the topic of teenage wearers.
For a politician, taking up such a topic is (political) suicide. He would be immediately shouted by opponents and the media that he "promotes perversion."
toad I know a young man and nothing his parents or the courts have tried to change his behavior and mindset has worked to curb his criminality.
If the court with the entire arsenal of educational and correctional means could not do anything, then wearing a cage would certainly not do much. In practice, the boy would have to agree to wear it himself, otherwise he would simply free himself from it, since he had such a "difficult" character.
Angelina at least the involuntary ones here (like me) would be protected a bit
I think you draw a wrong conclusion. Already people in your situation are protected by law and authorities, the only issue is whether you want to benefit from this protection (with all its consequences) or not. I am afraid that if the chastity belts became widespread, there would be many more cases like yours.