Nope, bad behavior should never become normalized or rationalized. Our society would fall apart. We are a nation of laws and that law and order is what keeps us from collapsing into anarchy. Just because someone has an irregular brain scan does not give them a golden ticket to just do what ever they want because they are mentally ill.
They need to be drugged up and have a responsible 3rd party (one who explicitly agrees to it not just pinning it to a parent or spouse), if there is no 3rd party they need to be put in an institution.
It is totally unacceptable to let known crazy people just go about day to day lives never knowing when they will loose it.
The courts would have to wait for them to do something crazy first but once they do the mental condition should work against them not for them. For instance some guy that shoots his wife that he catches in bed with another man is not likely to go shoot up a grocery store full of people, he will likely lead a normal life and not be a nusance to society. The crazy person who is caught accosting someone should have more severe sanctions since its likely they will do something way worse later on.
Another for instance most people at least know someone who has a nut job spouse, as soon as it is documented that they are a nut job they should loose all standing in court for a divorce and child custody. My last boss had a "bipolar" ex wife and she had so much standing in court that it messed up him and his kids for years. She eventually lost standing but it had to go WAY over the top and took YEARS and she was able to do ALOT of financial and emotional damage to him and the kids before the courts finally said enough. The first documented case she should have been done, no pass go no collect anything. As soon as it can be documented that she is not a rational person the sun should set on her ever seeing her kids or having any favorable standing in divorce court. We are way to soft on this stuff in our society.
I agree we need more research into this sort of thing so we can isolate these people from the rest of society because they do a lot of harm with relatively no consequences.
Another instance was a woman hopped up on phycotropic drugs and went driving and killed a family of 3, the judge said, oh she is crazy so its ok, she got off with a wrist slap. A family of 3 is dead and the extended family devisated and she gets to walk away when she should have got a needle in her arm.
I am watching events unfold in our nation and the people have already had it now its just a matter of govt loosing a little power and if the police state starts to waiver people will start taking care of this stuff on their own because its clear the courts are not.
It might also remove the stigma and get people to realize that these are real medical conditions that need treatment instead of the popular stance that these are just "bad behavior" and the patient has control to correct the situation simply by a change in attitude.