Thanks .. yes I do agree with what you're saying .. I have previously written about how through the California wildfires, as hosepipe bans were enforced, Nestle were drawing 36 million gallons of water from the Californian national forest. And equally how (through the world bank) Bechtel and Suez attempted a coup on Bolivian water supplies, like you say making it illegal for people to collect their own rainwater. The glimmer of hope being, that in what is now termed the Bolivian water wars, the people fought back and were able to take back control. Not that I'm suggesting fighting, just a bit of forward planning.
I would suggest stocking up on as many organic seeds as you can (we can even create indoor or balcony gardens) and stocking the seeds the food produces .. give the surplus to friends, pay it forward, find a small patch of wilderness and start your own hidden garden .. and screw what Nestle says, nobody owns the water from the sky and that is a court case in the waiting. But yes, I do know this is all getting too close for comfort.