I'm more on par with stabman on this.. if I'm at the post office, I may use a knife to open an envelope if it is something that I can open and use the enclosed envelope to turn right around then and there. I just focus on what I'm doing and don't look at anyone... some people just see eye contact as a threat, knife or no knife. I live in a rural area, and have seen a dozen other folks use a knife to open mail at the PO. If there is ANY justified use, I say GO FOR IT... like stabman says... people need to see them as a tool... and it helps if they see it USED as a tool. Like it has been said here.. people see a Kitchen knife as a tool first and foremost, and that is why they are not really frightening. If you were at a picnic, and used a big serrated carving knife to slice off brisket, nobody would budge or feel uncomfortable. However, when you sit at the table, and pull out a Lg. Sebenza, somehow, people see you as a bad guy because you CARRY a "weapon." ...a weapon you are using as a tool, and offensive by doing such. Of course, the educated see it the other way around. Never mind that there are yahoos with badges carrying open arms on their sides... they "promised" to be good. I see them as regular people with guns, and the unhealthy see them as incapable of misuse. Mainstream media is destroying our world. Guess who runs the media.. those who wish to disarm you and make criminals out of honest people. These are corporations who would like to have you work for minimum wage. New laws will be passed, and magically, YOU will be a criminal. It's the newest way for "ensurance" of slave labor. Criminals are/will be "pumpin' for the man."