Yea And I bet one of them got away with a corkscrew on board. And is the 4 inch scissor blade regulation measure or guy eye ball measure because 4 inch regulation sound dangerous but if it just eye balled 4 inches is pretty harmless.
Not to rub it in, but I've made it through with a corkscrew. I had one in my purse (long story - felt really classy), which they took out and examined, then gave it back.