I saw on The Ottowa Citizen about a story that a muggle bomb squad destroyed a cache in Ottowa becacuse they thought it was a bomb. The cache was apparently not placed according to guidelines but regardless we need to be careful. The muggles have a zero tolerance approach to anything that even resembles a bomb. It's probably for good reason, but you do have to wonder if the're a little paranoid these days. Another good reson to keep your caches hidden and away from the muggles.