I understand what people are saying about knife running,
But its not as easy as everyone makes out. It does actually have its own set of skills that are required. I think a lot people who just call it an Instant win button are missing point. 99% you can't run straight at someone, you have come from side or behind. sometimes you can run at them, but normally that means you taken them by surprise. most knife kills when running come from catching people from the side, round corners, flash bangs, or just reloading or off guard. you can tell the people who have skill in BO because then normally take me down quickly before I can get in Knifing distance.
I would say the Big failing for most players is tunnel vision. which is exactly why knife running is so effective. because players tend to only aware of what's down the barrel of there gun. which means, as knife runner I can come from side and knife them.
for those who argue that its not realistic, I don't think Black Ops is realist at all anyway. there is a lot in game that makes it unrealistic and I think Knifing is not one of them. I just enjoy knife running as I enjoy the challenge of being sneaky enough to get behind the enemy and come from behind or, catch player out who's camping, a lot time Knife running is one best counters to a camper. I think those who keep attacking knife runners. are missing the point and normally those who get caught out by them. like people who keep getting shot by campers, normally bitch about camping. my view is look at what skills and tricks make it harder for Knife runner to get you. then work on those skills. then you will start being able to counter a Knife runner.
http://www.youtube.com/watch?v=Bm6ivkAT4oo