People should leave Samurai alone.   They are for the most part harmless.   I saw one in full, elaborate Samurai dress walking down my street here in Springfield last week.   And he was carrying both a huge Katana, as well as the much smaller Wakizashi.

However, he was just strolling down the street, not bothering anyone.  People should not be so fearful of armed Samurai.  I certainly saw no need to dial 911.