I assure you that if you found that box sitting there and called 911 and they sent someone out to check it out, no one would ever question the legitimacy of your call. You seem to be forgetting where this box was located. The bad sign design by itself is not absolutely convincing of course but considering all circumstances, the location of the box, the maybe somewhat real danger of terrorism in exactly this area, the easy build and also the psychological aspects.. Yeah, this would be a legitimate call to at least the local PD.<p>Also I am talking about logical undeniability.. And I think you know already..