Never invite any kind of spirit to enter either your home or your person. This is an extremely important point to remember. To do so always risks to unwittingly invite evil spirits in, instead. Good spirits never need to be invited in.
Never interrupt a faerie circle ceremony. And, if a faerie has appeared to you, visually, do not speak to it until it has spoken to you. These two transgressions are considered so rude, that the faeries may literally attack you, on the spot.
