I... don't believe that? I mean, I've used public bathrooms... and I've used tech worker bathrooms. Yes, maintenance is required. that's part of provisioning a restroom. I... do not believe that the homeless are significantly worse than the techworkers (once you factor in just how often the techworker bathrooms are cleaned, I think we might be the bigger problem here?)

I mean, certainly cleaning is the major cost of provisioning a public bathroom, and that needs to be carefully considered during the design of such things. but I don't think that makes public restrooms impossible, just more expensive.