The bottom line is they have as much a right to be there as you do and you're free to ignore them or interact with them as much or as little as you want to.

That's not the bottom line, the law is the law nobody is arguing to kick anyone out. This thread was just about why someone might not want to go there and then being gaslighted that homeless people are somehow not a risk group in any way lol

It's up to you to do your own assessment but I don't see any reason to be fearful.

These are regulars at that library who never caused enough disruption to be banned, and aren't dangerous enough to be in jail. They also have more to lose by getting banned than housed patrons.

There absolutely are people which are fine and there are one's that don't. No need to create these specific scenarios.

That's the whole point of that post.