Just telling people "don't do that" rarely works. I'm not going to go back to wiping my arse with paper like some kind of barbarian, and I'm not leaving shitty wipes in a bin for any period of time. Multiply that by millions (billions?).
We need to develop/commercialise sanitary materials that don't cause these sewage treatment and environmental problems, but they probably cost slightly more == less sales in the store == LESS PROFIT.