On one hand... I can see how someone could be quick to protect the children. On the other, I think people tend to be a little overly paranoid these days. I mean you can't even have squirt "guns" in schools these days. Hell when I was a kid, that was the best part of recess or field day!
This though.... this is overboard.
A student at Ashwaubenon High School in Green Bay, Wisconsin, came dressed up as Darth Vader to celebrate May The Fourth. Unfortunately, someone driving by saw the outfit and thought it was somebody in full body armor. The police came quickly and put the school on lockdown to ensure safety.
Here's the news report from WLUK-TV Fox 11.