This is sort of a half-fix but what would ultimately mean is that when a city installs a lot of solar/other stuff (for the benefit of their citizens to lower pollution/electricity costs/etc) and thus have excess cheap power to sell back to the grid or use, bitcoin miners would move in and use up all excess while its cheap, leading to the permanent residents of a town getting no cost benefit to doing it. They might even have to fire up the coal plants again to meet demand.
I can totally understand permanent residents of a city working with the council to basically say nope to that. They live there. Its their choice, thats how city governance works.
Otherwise what ends up happening is that the miners move in and starts increasing demand whenever the cost is under a certain amount, which means the cost has a strict floor at the price of bitcoin generation. It can never ever be cheaper than that, because the moment its cheaper than that, miners absorb all the excess, causing the cost of electricity to be tied to the price of bitcoin, something you probably don't want for your city if you live there, especially if you've been investing in infrastructure to reduce energy prices / clean pollution.
It gets worse, too. You might decide 'fine, let the market decide', so you are forced to build more electricity-producing plants to meet this rising demand and keep pushing costs down or face brownouts / blackouts in residential. Its really, really really expensive to build electric generation plants and the infrastructure to support them, and it takes a really long time, and they are expensive to maintain running, even if you 'turn them off'. But the miners move out whenever there's some other better opportunity elsewhere, leaving you with all this infrastructure your permanent residents payed for and are being taxed on...