Are serial killers who actually kill people really shocking to people? Well, the answer to that question depends a lot on how much you let its framing determine your thinking, right?
Sure, I too, personally, don't share anything personally identifying on FB, in violation of FB and G+'s TOS BTW. But all those naive people, they walked through the door, they didn't see the samurai behind the door and pow, what do they expect? They won't be play in the Seven Samurai now. Why should we Samurai give a heck about them morons? Well, there are some reasons, starting with the fact that we have personal relations, with non-Samurai.
http://en.wikipedia.org/wiki/Seven_Samurai
"Again we are defeated," Kambei muses. "The winners are those farmers. Not us."