Being an Obscure but Short Consideration of an Obscure Point of Magical Art in Druidic Rites.
Why do we feel that we are safe and the work is well-done using the methods we do? I think it comes from several basic differences in emphasis between traditional ceremonial magic (maybe as far back as proto-hermetic times) and a tribal, spiritist perspective.
1: The Worship Pact: The entire thrust of our rites (at least our religious rites, rather than magical rites with specific goal-effects) is to welcome all beings to receive their due offering with honor.
2: The Protections of *ghosti: (Can I capitalize that asterisk?) Since we do not divide the spirit world into Our side and Theirs, good spirits against evil ones, we expect all arrivals to abide by the peace of the holy place. Even ill-doers think twice before breaking guest-custom, and all the spirits that come are guests at our fires.
On a more technical level, I think that the Gate Opening & Closing is our equivalent of CM ‘banishing’ rites. However, it operates using a different metaphor. Rather than thinking of the Otherworld as identical with our perceived space, and ‘clearing out’ spirits from a perceived area of space, the Gate Opening opens a Way between two conterminous realms. When that Gate is closed contact is not easy. When that Gate is opened the way is clear, and the spirits and mortals are visible to one another. We can quibble about whether and in what way the Gate spell is required in order for one to speak with the Gods and Spirits. However, in a technical ritual sense, the opening and closing is our equivalent of “Now we are open to communication” and “Now we intend communication to end”. By closing the Gate we say to the spirits “you no longer have my permission to influence me”. In other words, they have returned to their realms, full of our offerings and with our thanks.