> The law determines that public space can't be used for any sexual activity.

Follow-up question: Does an enclosed stall count as "public space"?

If I'm about to step into it 5 seconds after you leave, yes it does.

And yet when I want to do some photography, as is my right in public spaces, everyone gets all indignant.

the pissoir . . . the greatest concession most of them made to privacy was a little iron screen separating the user from the street.

Look at the photos in the article, they weren't enclosed stalls. Its elegant in a way, just a couple feet of opaque material that wraps the beltline of a central aiming point. Basically as good as going on a tree but without people getting uptight.