There's a bridge on RT 2 near the Glendale / Silver Lake area that can't be described as anything other than a public health hazard due to the amount of people, junk, and debris that line the sidewalks. The city chooses not to address it (for, what I optimistically hope are legitimate reasons), but it's been that way for going on 2 years now, so I begin to wonder.
I appreciate the complexity of the drug & mental health issues (have an aunt who has been homeless much of her life b/c of mental health issues), and I also understand how as a society we decided to allow those with mental health issues to have the right to not enter treatment. It's a massively complicated situation (hence me not really stating true solutions, other than finding ways to incentivize better collective action).