As far as how are they a threat, really?
The internet is overflowing with articles like this. https://www.foxla.com/news/lapd-woman-stabbed-in-head-scisso...
And yes, really, I'm asking how they're a threat when they're unconscious? Just because they're homeless doesn't make them dangerous. This attitude of the homeless being a nuisance or and inconvenience instead of part of the community only exacerbates the problem and makes them less likely to receive the help they need. Homelessness is a complex issue and I'm not sure what the solution is but seeing them as people in tough circumstances that need help is a start.
I invite people in my community into my home. Do you expect me to invite homeless addicts into my house?
Homeless people are a "nuisance and inconvenience" to the community. To argue otherwise is to be disingenuous.
These are just from yesterday
https://ktla.com/news/local-news/homeless-man-accused-of-fat...
https://www.fox5dc.com/news/pittsburgh-police-arrest-suspect...