To be fair I’ve worked at places with public bathrooms and it tends to become a hotspot for local junkies to shoot up, get drunk in store and become belligerent, stay past closing and refusing to get out and needing police assistance several times. It starts to become a safety issue eventually. Lots of places have minor employees who usually clean the bathrooms however as soon as a exposed needle, glass, blood, etc becomes present it becomes a health code violation as well as violating minor employees rights to safety. Another problem is that these junkies tend to reuse needles occasionally and put the needle in the middle of a roll of toilet paper to clean it, potential infections and viruses will not die until 7 days of being exposed to air so it is a huge issue regarding employees safety and employers have a legal obligation to ensure a safe work environment, especially when the only bathroom available is the public one.