I don't mean to shit on (pun intended) your solution, but really, the solution is for society to get serious in dealing with homelessness and to Do The Right Th

I don't mean to shit on (pun intended) your solution, but really, the solution is for society to get serious in dealing with homelessness and to Do The Right Thing. You, me and other others here have no idea what the right thing is. We can guess, but many of those guesses will have very unexpected side effects. (People using locked showers for things other than showering, for example.)