Hardcore team death match player here
Throwing knives are DEFINITELY humiliating to get whacked with
I've yet to see one on the last kill cam, but that would be hilarious! And riot shields have been quite annoying whenever I've encountered them, if the person hiding behind knows what they are doing they can run up quite a streak. It doesn't help that one melee hit from it = death on hardcore (which I don't really agree with, but hey). Though I have learned to shoot at the feet.