His increasing fixation on the "toxics" and violent rhetoric towards them is concerning. When he gets released and things don't follow the script he's written in his head, it could be that he may decide he no longer has anything to lose and feel the world around him is to blame for the sorry state of his life and either lash out violently towards someone he sees as a "toxic", or will try to convince someone to perform violence on his behalf, much like how he tried to get Null to hire professional hitmen for him in the past.