Earlier quoted context omitted.
But the arena for that fight is legislation. Weed didn't become legal through lawsuits, it became legal because laws were repealed. I hope IA prevails but it's long shot, even more with the Heritage infestation of the courts.
Everyone just ignoring bad laws and contradicting them can remove laws too. But of course this is a niche topic that would never get such broad support. A lot of people smoking weed is certainly a component for the prohibition to fail at some point. Writing mails to legislative members isn't enough if you don't have any form of leverage.
It requires that people refuse plea deals and demand jury trials, and that the jury is educated on what jury nullification is but when prosecutors can't get a conviction regardless of much evidence they have of guilt the laws will get changed or at least they stop being enforced.