Despite my jokingly extreme take on the sentence in a few of my posts, I do have a concern that judges are perhaps attempting some method of aversion therapy with these types of sentences. They might work teaching a young child or a teen to not bully others, but that does not mean they translate to an adult effectively. As well educated as some judges are, without a degree in psychology and clinical experience, they should refrain from prescribing or treating from the bench.
His numerous acts of trickery and weird, bizarre, raging vandalism, some acts being potentially deadly, such as using a fan to blow fuel vapors at the house, which are especially toxic to people in debilitated condition, and disgusting feces smearing, which has obvious bacterial infection risks to the disabled people in the home, by this man over the course of 15 years, warrant a professional psychiatric evaluation. Also, his habit of yelling racial slurs at the family underscores something quite a bit beyond the pale for a "bullying" charge. Maybe terroristic threats or hate crime criminal code related ethnic harassment might be more fitting charges for his actions.
I think that he's a bit too much of a perpetrator to be just publicly humiliated for a few hours, in fact, I suspect that public humiliation may turn out to spur him on to much worse acts out of a bruised and viciously bitter ego. This guy could easily prove to be a sociopath or a psychopath or just dangerously emotionally disturbed. The family is still in danger from him, it seems to me.