That is a good, general list of rules. Like Alan, I have issue with the abolishment of ammo containers. If someone is going to plant a bomb, they will either ignore the rules altogether or make a bomb that appears to be in compliance with the rules. I understand their intent is to avoid “alarming” people who stumble across the cache, but for the most part, I don’t think dead tree stumps and piles of bark are common terrorist targets.

In addition, I don’t know that ammo cans are commonly associated with bombs. They are known to hold ammo. PVC pipes, on the other hand, may bring the phrase “pipe-bomb” to mind.