[ozone]

Well that's a good idea but I wouldn't want to see toilets right on the mall either.

One way to handle the probelm is just to require businesses on and around the mall to keep their toilets open to the public like they do in some other cities. I know its a hassle to keep them clean but if the alternative is to have someone pee in your doorway what's worse? But that really won't solve the problem because the homeless and sh't faced mostly pee on the streets at night when everythings closed.

How about creating a mini-police station (koban) & light-rail "storefront station" with a self-cleaning restroom? The city could easily take one of those hard-to-rent spaces and remodel it nicely.