I hardly think a bunch of randoms names and email addresses warrants a Fort Knox-type security response. These are public records and accessible by others already (politicians, local councils etc), and there’s nothing to stop you putting unaddressed information into the on-site mail boxes which you are required to have.
And why would them keeping these records necessarily be any more secure than the way you would? Legislation says the roll information is yours (as an interested party) to access, and to contact as you desire, the content of which is most likely none of their business.
You can’t Motion against legislation and you don’t need to Motion for it. It’s all a bit of a time-wasting nonsense really.