When there's no public bathrooms, everything is a "public bathroom'.
Just 2 weeks ago, saw people pissing/shitting at a pull-over in Iceland. Laws explicitly forbid that... But when you gotta go, you go.
And Iceland also hits people with NO public restrooms at all, and pay restrooms to boot. I saw upwards of $1.50 for bathroom usage.
And in the USA, bathrooms are free, but almost always exclusively corporate funded, and usually "customers only". And in my local city, there's a few real city public restrooms. They naturally lock themselves after 11pm. Yeah, it's anti-homeless shit.