It can be annoying when you come up against someone who is really good with it. Almost anyone can get a few kills with it but becoming good with it is a skill just like sniping ,fusion rifles or shot gunning. That's why I don't get the throwing knife nerf, it took skill to be really good with them. So ya they can be annoying but coming up against a good,sniper,shot gunner or fusion rifler is no less so. They all can be countered but its harder against someone who is proficient with them.