Is that for all paint? It looks like they only offer pickup for oil-based paints, and latex/acrylic-based should drop off: https://sfrecycles.org/items?words=paint&address=all

I was curious, because I know SF has a high enough population:water ratio that stricter treatment is required, but on the other hand modern non-oil paints are relatively chemically safe (at worst, probably the off-gasing parts).

Not sure. I don't live in the city anymore but your comment made me realize I didn't know either.