Hmm...
1. No Trick-Or-Treaters over the age of 12.
2. No left-over candy from previous holidays (i.e., jelly beans, candy canes, et cetera).
3. No active lawn sprinklers from dusk to 22:00 (10:00 pm).
4. Blowing up someone else's Jack O'Lantern is prohibited.
5. If the porch light is off, stay away.
6. Lawn decorations are to be looked at, not touched (and certainly not stolen).
7. ... ?
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.