OK. Let's get serious. Most toilets are misused by men who are more likely to be vandals, graffiti 'artists', using public toilets for 'assignations' or actually needing a piss since they are more likely to drink pints.
Lets bring in 'pissoirs' which whilst preserving modesty are open enough for people to be dissuaded from 'misusing'.
There are modern examples in use in London:-
As for WCs, we should have unisex cubicles opening directly into the public space.
Let's be honest. We all go to the toilet. Why are we so infantile in our attitudes? It's because we hide them away that they are in the state they are.
"We are living in very strange times, and they are likely to get a lot stranger before we bottom out"
Dr. Hunter S Thompson