Funny thing about those little protrusions (flippers)--last time I crossed the border on a trip to Canada, my vehicle was selected for a random search. And yes, the Customs guys found at least two or three knives they took exception too.
One young Customs guy held up my Kershaw Leek and said: "In Canada, this is the same as a gun!" He must have noticed the confused look in my face, and added: "Because you could walk up to someone, push this lever, AND STAB THEM!"
Crazy, no? But that's what the guy said.
Now in fairness, Canadians think owning an AR15 with a 30 round magazine is crazy too. Couple of folks in California and Connecticut think along the same lines.
Me? I think its crazy that owning either the knife or the rifle, makes other people think I want to kill someone.
I mean, you know, I'm just a regular guy--I don't want kill anybody!