Jeff: Another sign I often see is that posted on one of those "hand sanitizers" that appeal to so many neurotic people who are fearful that nature may be (gasp!) loaded with bacteria out to get them. It reads: "Please sanitize your hands to help maintain a healthy environment." With all of the dirt, germs, unvaccinated wild animals, and carbon-dioxide-breathing plants to contend with, I wonder if this hand sanitizer will be enough. Maybe this stuff can be converted to warding off terrorists, drug-users, and even vivisectionists!