Earlier quoted context omitted.
Train/Bus stations, shopping malls, libraries, homeless shelters, fast food restaurants, gas stations, hotel lobbies, churches The destitute do also patronize businesses as well from time to time. You do nobody any favors by infantilizing them. Grown adults can find a place to relieve themselves without fouling the public space. If not, perhaps they need to be placed in a facility where they can receive the care and…
I'm not sure what it's like where you live but where I live it's like this. Train/Bus stations don't have bathrooms. Homeless shelters and the churches which do provide services make you leave during the day and do not let people back in under any circumstances until around 5 PM. Fast food restaurants, gas stations and hotel lobbies all lock their bathrooms and allow access to patrons only. Which leaves shopping mall…
Even places with locks on the bathrooms will usually let people use them if they ask. It is not unreasonable to imagine someone, no matter how destitute, getting something off the dollar menu at McDonald’s. Many do. Many certainly have no trouble finding enough money for drugs or alcohol so it’s not unreasonable to expect they can get a fast food meal and use the bathroom.
In the absolute worst case scenario, find a secluded place in a park and dig a hole, or get a plastic bag and throw it away. There’s no excuse for leaving feces on the sidewalk.
Sorry, but “don’t shit in the common area” has been table stakes for participating in human society since the beginning of time. Even in a hunter gatherer society someone taking a dump next to the campfire would be rightly ostracized.