It is both amusing and disturbing to see people squealing like a victorian matron sighting a mouse whenever someone sees a gun. Honestly, rural America is awash with guns and such communities are far safer than urban areas. If someone cleared a hotel in my hometown because someone walked in with a deer rifle, the laughter would never stop.
[Update (7:28 9.25.2008): The FBI has determined that “no credible threat” existed in an incident in Denver separate from this one that some believed might have triggered this silliness.]