Disabusing someone of a threat should result in the disappearance of potentially damaging distress, but simply correcting one's beliefs does not similarly protect against physical injury.
I suspect that his dealing with it will be very much on the lines of disabusing these bodies' fears.
Disabusing people of that misapprehension would help, as the delivery of polling cards is often even less efficient than the organisation of the register.
The lawyers had better start disabusing their minds.
