From the perspective of your electrical meter, there is no difference between running 2 120V appliances on separate busses vs running a single 240V appliance assuming they consume the same overall wattage. So this would be a very difficult thing to enforce.
That’s what a meter with more intelligence is used (and ya, it would need tighter coupling with the panel where 240V circuits are formed).
240V are what run electric stoves. I guess no cooking either. Why don't we just have a functioning grid like civilized society?