I'm 72, been carrying a pocket knife since I was 4-5 years old. Was never questioned about carrying a knife during any school. Still carry one every day. I switch around from time to time, no certain kind. But lately it makes sense to carry something you can open with one hand for obvious reasons. I probably own over two hundred knives. You might say I like knives. Last few years, I've been making sheath knives as gifts for family and friends.
As far as neck knives, can't see a reason for them. And I'm not wearing any kind of cords or straps around my neck that won't breakaway under tension.
As someone mentioned earlier, I carry my knife on the off side (left for me). My right pocket usually has something else in it.
BTW, my wife carries a small SAK in her purse, wouldn't be caught without it.