More granular targeting is potentially concerning in itself depending on your threat model - e.g. if it's only possible to attack an entire town, then you're safe as long as any actor is not willing to attack the entire town, and likely to have allies in your neighbors if they do. If it's possible to attack all of the people who I don't like in that town specifically, that changes things.
Also, the smart meters do more than just enable remote shut-off on a per unit basis, they also allow for more granular data capture around your usage patterns throughout the day, which someone might not appreciate for a number of reasons, e.g. viewing that data as private, or preferring flat-rate billing as opposed to the time of day based pricing schemes that it enables.
More generally, these sorts of systems are not without their advantages, but they are characterized by an increase in centralized control and surveillance.
Also, the smart meters do more than just enable remote shut-off on a per unit basis, they also allow for more granular data capture around your usage patterns throughout the day, which someone might not appreciate for a number of reasons, e.g. viewing that data as private, or preferring flat-rate billing as opposed to the time of day based pricing schemes that it enables.
More generally, these sorts of systems are not without their advantages, but they are characterized by an increase in centralized control and surveillance.