The apparent attitude is that if it appears you "just forgot" and it's not too offensive looking, they will confiscate the so-called weapon and let you go on your merry way. If it appears you have purposely tried to circumvent the rules, as they might well percieve soemthing like this or non-metallic/non-magnetic blades, they may just arrest you. Is it worth going to jail or worse becuase they are being stupid? I don't think so.<br><br>For that matter, I just filed down the edge of a credit card and while it wouldn't cut much, if would be better than nothing as an improvised defensive weapon if need be.