I don't carry magazines in an open top carrier anymore. I got in fight, bad guy grabbed a magazine, hit me in the head with it, and I got lucky that all I needed was stitches. That guy was trying to get away, he didn't go out of his way to try to hurt me. He could have easily killed me. I don't know anyone else that it's happened too, but anything you carry is fair game to be used against you, so don't make it easy. I don't give a shit about the politics. Leaving a knife hanging out there is asking for trouble. Not the I got talked to by my supervisor kind of trouble, the I didn't make it home at the end of my shift trouble. Idiot officers asking idiot questions and ninny citizens making ninny complaints, are giving a pretty big clue that someone is doing a pretty lousy job protecting themselves. Out of sight, out of everyone's mind.
I don't think I've seen many stabbing with knives (semantics shemantics). Lots of cuttings. As rare as they are, homeless on homeless screwdriver attacks are almost always fatal since they getting deep and making lots of holes.