I think the hope is that the lack of water for cooling will cause permanent damage by overheating. But the reality is there are failsafes to prevent this.

Shutting down a data center for the cost of a bag of cement is a good cost to loss ratio though. It may only be for a day but that is easily repeatable. Shut it down every few days while they are already losing money running at a loss and trying to show some sort of usage stats that will get fucked by the repeated shutdowns.

Obviously you have to find multiple ways to fuck with them like bad additives in their diesel generator fuel tanks. Drones dropping epoxy into the cooling fans on the roof.