I remember my father having two copies of the oh-so-precious Congregation Contact List (only elders were permitted to have it), listing all the friends' phone numbers and addresses. We were under strict orders that, if persecution were to suddenly break out and he was at work, it was our job to tear them up into little pieces and flush them down the toilet so the police would have a harder time tracking down the friends.
I also recall having a reversable coat when I was young. I remember speculating how it would be that much easier to escape from the police out in service now that I had this fancy new coat.