If you actually think someone is psychotic -- suffering from psychosis -- offer some kindness is preferable to making them the butt of a snarky comment because you don't like how a public plaza was designed. Psychosis is a symptom of severe mental illness and reportedly very scary to those who have gone through it.
Also, I'm cool with homeless people using public plazas because I recognize they are human beings.
They do cause issues with the public plaza and the nearby subway entrance, though. Obviously I have no problem with homeless people in general, but with the ones who continuously harass people and behave violently, I have a big problem.
Before the redesign, there were certain homeless individuals who would harass me when I walked by (I'm a woman), follow me down into the subway sometimes, scream at people walking by, and pass out on the stairs so no one could get into the subway entrance. Their behavior is scary and honestly, unwelcome.
While the plaza was under construction, they disappeared and the homeless people who remained were pretty chill, the worst they did was pass out in the subway. But now that the plaza is back, so are the violent people who lived there before. In fact, I just saw the worst offender for the first time in months, drunk and barefoot and screaming in the plaza. So don't say that this isn't an issue, maybe you're a man and live without fear of random attacks, but I have seen them be violent before and now I have to change the subway entrance I use to go to work everyday. Very unfair and there is never any police presence nearby to keep things calm.