I could see local municipalities suing the leading wipe manufacturers in a community for labeling their products "flushable" and having a pretty good shot at winning.
I'm curious what sort of products and systems a world that tied products and user behavior to the manufacturer. Ie, if a Coke can is found in a national park, coke gets a fine. Rights issues and economic practicalities aside, I'm curious what sorts of things companies would create if this were the case.