For whatever reason, Seattle seems to have a particularly huge homeless population. They're far more noticeable (and more aggressive) there than they are in other cities I've lived in. Or maybe they're more concentrated or something, I dunno.

Anyway, although other cities have homeless problems, in Seattle it often seemed like public places would be swamped with virtual armies of them, and dealing with that is a real issue.

[Disclaimer: I haven't actually lived in Seattle for 20 years, and have only visited since.]