On one hand small actions can lead to big change. On the other hand, no matter how many small actions are taken, this problem isn't going to be solved with government intervention.
But yeah, forbidding restaurants to distribute drinking water is probably not the right move.
This is one of those things that we teach small children so they can feel like they are contributing but never go back and explain to teens that we were bs’ing about. These kids then grow up with a bad model of how the world works. This dynamic is pernicious.
No amount of at home composting or whatever the latest peacock thing is will make a real dent.