It already happens today with little complaint.. many utilities are offering discounted rates if you agree to let them reduce your consumption on a handful of days per year. One such example;

https://consumersenergy-faqs.tendrilinc.com/faqs/what-is-the...

Everything's fine as long as it's voluntary. And by voluntary I mean both not compulsory (mandated by some level of government) as well as not normalized to such a degree that virtually every electric provider independently offers no other option. These types of things have a way of worming their way into our everyday lives; I imagine I'm not the only one who is wary of loss of agency from this as well as other similar things as the Overton window is dragged farther and farther away over time.

I think GP meant overheating/overcooling during off-peak hours? In which case plenty of people in well-insulated buildings go along with this, motivated by lower electricity prices during off-peak hours.

I took it as over-heating/cooling during peak electric production time (daylight probably) when power is more available in order to reduce usage during off-peak times. I think it would require compulsion or a large amount of voluntary adoption on the part of the customers to really make much of a difference though, and I doubt that the latter is likely on a meaningful scale (though I could be wrong of course).