I mean... homeless people read books. Seems like a good use of time to me when you're unemployed and homeless. It sounds like you think is a problem for some reason?
It's just not something I see homeless people do. So I was quite unfamiliar with the sight. Everyone has the right to do what they want with their time, but for me, I would imagine trying to find a proper job would be more important. Off course, I don't know about their situation so I shouldn't judge.
Who do you think would hire a homeless person walking in off the street? There are other aspects to life that need stabilizing before they think about finding work.
If you see a non-homeless person reading a book, do you automatically assume they are neglecting their spouse, kids and job? And do you not have anything more important to do than read HN?