When will "less is more" come into play?
But yes, I would charge folks for using too much.Crypto mining will put you well above the median use. You can have wide margins: 2-3 times median use for the house size and number of occupants - after offering an investigation to be sure folks aren't stealing their power. Few folks would go over this. Realistically folks are mining cryptocurrency to make a profit, making it a business, so we could just switch it over to a business account.
It isn't like the system we use is more than this. We bill people every single month and process their payments as they come in: The vast majority of this would be completely gone. Most states in the US have their own Public Utility commission with their own rules and regulations on top of what federal regulatory agencies have - in part, these agencies set rules on how utilities can bill people, rules about payment plans, and rules about when they can shut people off. So much of this wouldn't be needed either. On top of this, we have a patchwork of regulations to help poor folks with their electric bills - which could be eliminated completely.
I don't know how this is "less". I'm just proposing different, and probably simplified. I think people just get caught up on "But I don't wanna help them" or that it is "free".
I'm not nearly as concerned with folks leaving air conditioning on: You never know what sorts of lives folks lead nor if they happen to have a medical condition that makes them need cool air (Multiple Sclerosis, for example, causes heat intolerance. A cool home when you get home from work means you can cook dinner.) And besides, surely there are ways to fight against that as well.