Comment by myrmidon
Be very careful about considering this a "grassroots campaign" against "evil foreign megacorps".
This is lobbying effort directed at policy makers and the public.
As others have pointed out: There is an very simple solution to "solve" water waste/allocation: Just put a price on it.
BUT one big interest group, namely agriculture/farmers, absolutely don't want that, because they historically could pretty much use water for free (and/or underpaid massively)-- any rational discussion about water use/price/allocation is undesirable to them, because it is likely to make the situation worse for them comparatively.
This is also why the whole discussion centers round emotional arguments against allowing industrial water use at all, instead of arguing that small/local farmers should get a better price on it.
Putting a price on it does not solve it because the entities that compete for the water with the data centers are out-matched financially. How is a city that has a budget that is constantly dealing with budget cuts supposed to pay more for water than a multi-billion dollar company? Taxing it does not solve it either, because there are so many incentives to writing loopholes into the tax code.
They don't even have to use water - there are alternatives. The solve is changing behavior of the leaders in this greedy industry.