Nobody's shutting off those 150 homes to take their electricity, though. They have to buy it themselves. Lots of industrial things take tons of energy, from metal smelting to food production.

Oh, and datacenters alone shouldn't even make electricity more expensive, because rates are regulated. The state regulators have to approve rate raises. Now, are the regulators a bunch of stooges captured by the utilities who always do their bidding? Probably! But that's a good reason to throw your corrupt state politicians out of office and hopefully run them out of town on a rail -- not to protest datacenters.