So one small thing we can do is not to buy these products, and instead buy products with natural exfoliants.
Its ashame that consumers even have to watch out for this...these companies should not even be allowed to sell plastic beads that are meant to go straight down the drain. They know they don't decompose, they know that wildlife are feeding on them, which means we are feeding on them too. In the closed loop world we live in, they are basically permitted to contaminate us in a law abiding way. Oy times a million.