The broom behind the door
Benevento tradition says that to keep the janare (the local witches) away, a broom behind the door was enough, or a little pile of salt on the threshold: before coming in, the witch had to count every single bristle. And dawn would find her still there, counting.
Strega Defence is our broom behind the door: it examines every connection, one by one, and whoever is not allowed stays outside.

