I have been walking home with someone who pissed in the street less than a block (I don't live in the US, we don't have blocks, but it was a couple of minutes) away from home.
Cmon, use that imagination of yours to go beyond what you have directly experienced.
Remember too that all drunk people have come from somewhere with a working toilet, because places that serve alcohol have toilets.
So to you it is axiomatic that the problem is insufficient toilets. You cannot understand that there are people - usually drunk - who will not use a toilet unless they are already inside it. It is not feasible to blanket a city in toilets sufficiently to eliminate public urination, so maybe a multi-pronged approach including discouraging people from doing so is more sensible.
"The transit"? There is transit all over Hamburg and there are three directly outside the Hauptbahnhof.
When they piss on the piss-splashing paint, it splashes them with piss, so they stop. I believe the point is that it sprays back at all angles.
I'm not claiming it's a magic bullet, but I am claiming that if you think this is about homeless people you are not thinking about drunk people and tourists, who are the genuine target.
The answer is drunk people.
I was once walking home with a drunk housemate who pissed in the street a few minutes away from home. Also "clean" does not enter into it. The street is not clean.
They have walked out of a club with a toilet five minutes ago. How frequently do you want there to be toilets?
The idea is that by putting the risk in people's minds it'll be a deterrent, or else by giving people a natural consequence (and also protecting the wall from being stained with piss) it'll deter repeat offenders.
How does the FBI compare to the federal/national police forces of other countries that makes it more susceptible?
Well I didn't spot that
Right I'm sure the people who piss in our gateway, mysteriously every Friday and Saturday while bellowing at each other, are homeless rather than smashed out of their tiny troglodyte minds.
Hamburg has a vast number of tourists, which makes it even worse, because tourists don't have to live in the city they're pissing all over, nor see again the person they flashed because the fumbled pulling up their pants.
Eating the small pieces of tortilla chip on a spoon with some dip is cereal
No, just a regular toilet in a public establishment. I don't know anyone who's thinking "this toilet is gross, so I'll piss in the fucking street". I guarantee you noone is wiping down the street with anti bacterial spray.
Toilets can get busy, yet queuing for one is very normal. Have you noticed that no-one sees the queue and goes on the corner?
That's because this is caused by drunk people failing to plan ahead and then when caught short not having any inhibitions.