Heard yesterday that Indiana has passed a law banning smoking in public parks. That includes vaping under the heading of "all other forms of smoking".
Indiana has some history when it comes to vaping regulation. They passed a very restrictive law concerning juice a few years ago, with bipartisan support. That got nixed for legal reasons but it suggests this latest one is likely to be the first salvo in a new crusade.
Original source: https://www.e-cigarette-forum.com/threads/vaping-in-public.965495/