Klipspringer:
Your so called law enforcement is not working
It's working fine. He and his cronies were convicted on charges that could be, you know, proven. And if the police seriously believe he is a real threat to the community then they can get a warrant to spy on him and then use that evidence against him.
As much I agree with you that he's a nut job, I also have to agree with KiwiNZ that there really doesn't appear to be a case for him to be a particular danger to society. You can be sure the police are keeping tabs on him though - if he starts looking serious I imagine they'll make sure to get it right next time. These 'technicalities' are there for a reason - they stop innocent people being sent to prison.