I’ve never heard of any such incident, either. Frankly, I can’t envision any way it would happen, short of some kind of tragedy such as murder taking place inside. If uninvited people were to barge in, they would be escorted out by the elderly ushers and business would resume as normal.
Without more info, though, I can’t give you any specific answer either.
Speaking of Mormon Temples, here is a video of
Mormon Temple Rituals to bring everyone up to
speed...
Mormon Temple Rituals http://www.youtube.com/watch?v=-K6n1PlTKQQ&mode=related&search=
Ironically, millions of mormons have never seen these
rituals in person.
ampu