If I'm packing heat or sharps, I'm sure as hell not going to tell anyone I don't know well and personally what I've got-- be it on my body, or in my collection....and usually, not even then. When it comes to protecting oneself, the less people who know your methods of defense, the better...whether they be friend, or foe.
P.S. My granny once told me never to show my teeth, unless I'm going to bite-- and I am a firm believer in this. You won't see any weapon I own, unless you're at the wrong end of it.