This would require some significant trial, design, study. My first question is are people who are willing to use a toilet publicly exposed actually likely to use it vs just some quiet street. And there are still plenty of ways to ruin a utilitarian toilet like shoving trash in and blocking the drain. At the very least most people can admit that the problem is more complex than simply dropping in some public toilet blocks.
You have to consider these things because there are more than enough people willing to destroy things simply for the purpose of destroying them.
You have to consider these things because there are more than enough people willing to destroy things simply for the purpose of destroying them.