Yes, but as the Grid people know all about this, it isn't going to be much of a surprise and they are used to dealing with far greater surges than any this campaign could cause.
And have you considered what would happen if at any time there was a huge surge - demand or supply? What would happen is that the grid would crash and electricity supply to part or the whole of the country would ensue.
This would mean power cut off to hospitals, traffic control, street lighting and all homes, may be for hours.
The National Grid has good well laid plans on how to get the grid up and running again if it does crash for any reason, so all the chaos would be with customers who are suddenly cut off, not with the National Grid who have been preparing for just such an event for decades.
It is puerile and futile, thought up by someone who really doesn't have a clue about how the National Grid runs.