If the authorities got involved with our community rather than giving protection we would probably get falsely associated with pedophiles instead! Its happened before...
Anyway, no. AB's (or at least the everyday AB) shouldn't be given that protection. We are adults. We have adult responsibility and have learned what we need to know for living in society as an adult. Most of us have a healthy balance sorted for this where we carry out our adult tasks in public, go to work etc and then go home and indulge in their escape to the little space when safely home alone or with other friends who share the interest.
Some people push the boundaries a little, wearing a diaper for fun to work hidden under their clothes or whatever. But that's as far as it goes, and as long as they are sensible and respectful of their colleagues nobody would ever find out. It has to stay that way to keep a healthy balance. When you start pushing your little lifestyle into every single aspect of your daily activities, and every single thought that you process in your head, it stops being healthy. Anyone I know of who has reached this point has eventually had to get help to ease off for one reason or another.
If you reach this point and manage to convince yourself that you are a little to the point of needing legal protection, and other things you have mentioned in recent posts here, then perhaps such protection is necessary, but already exists in the form of the mental health act, and related policies in place. In my opinion if you truly have the childish mindset 24/7 and can not / will not shake it off to function normally in society then perhaps taking the status of vulnerable adult is necessary, where you have extra help from a responsible adult where necessary, and lose rights to partake in other adult activities that you have brought up here in the past, like driving for example. Along with that comes the protection you asked about in this thread, as it is decided that you cannot be responsible for your own actions, or making important decisions.