Evolving Canines, de-evoloving people?

SF hands out a half million free needles to heroin addicts every year, most of which are discarded onto the streets (along with all of the human urine & feces). In fact, all of the restaurants/bars use blue lighting in their restrooms...so that the junkies don't shoot up in there (they can't see their veins under the blue lights). But yes, don't you dare use a plastic straw, or a single-use plastic bag!