But how would "they" switch off charging? My home charger is 7kW and dumb as a bag of rocks, I plug in, it gives me electrons. My portable charger is dumb, I plug in, it gives me electrons slowly. I can easily pull the telematics fuse for my car and that means no app connectivity so no remote control any more by me or any untrustworthy agent.
I mean this argument is silly because "they" could easily stop people driving in any area, doesn't matter if it's petrol, electric, hydrogen, Fred Flintstone style or whatever.
Edit: on the EV charging 'law' that's a regulation that would require EV chargers to automatically schedule to off peak times but all chargers would feature an override button to allow peak charging. It's about nudging people by making off peak the default. The 4-7pm period on most power grids is usually the worst time because of high demand which can't be constrained (unlike industry which often can), requiring a lot of fossils to balance the grid. At some points, it's been known for balancing costs to hit £3000/MWh, over 500x the normal rate. Anyway, if you were really terrified by that, you could stock up on cheap portable chargers from AliExpress which run off a Ceeform or equivalent and just give you 32 amps of charging whenever you need.