Apparently the GB has gotten their "education" regarding Demons from way too many viewings of Ghostbusters I, II and III. Demons do not attach to non-living objects; Demons enter into living beings generally by invitation.
I've always wondered why the witnesses are reluctant to "lay on hands" and prayerfully request that Demons be relocated. Perhaps because WTBorg Cult Inc. finds that Demons are very useful to their Mind Control techniques. It seems The Cult has a large bag of tricks that are used to generate fearful obedience to their twisted non-biblical dogma.