I'm much more worried with the customized dog tag thing than with prone. People will go nuts with the knives. Some months ago a guy managed to kill me 4 times with the knife in a single game! I was defending, and 3 out of four times he knifed me in the back while I was disarming the crate, just to be immediately gunned down by one of my teammates, who would then proceed to disarm.
Why would the guy leave cover and be vulnerable in the open to knife someone when he could be hidden while defending the armed crate? His team never got past the first base and I even got the ace pin, but it was annoying as hell.
That's not how smart people play this game, I usually just shoot an enemy in the face/back instead of trying to gut him.
The guy was a lvl. 50 who obviously knew how to play. He was very good at sneaking, and I think he was the one arming our crates since I killed him more than 7 times (got a nemesis pin) while he was arming. After the third time he knifed me I got pissed and decided to hunt him. I camped near one of the crates and some time later I saw a guy jumping a window going for the crate, so I left cover and ran towards him, knifing him in the back, and surprise!!! It was the little fucker. I was inebriated with the feeling of vengeance, and while I was happily disarming the crate some smart guy shot me in the head, and killed one of my stupid teammates that was disarming the crate right next to me, instead of giving me cover. We lost that mcom, and I vowed to never do something that stupid again. Fortunately we won the game . And if I ever see a guy running for a crate I just shoot him, instead of letting him arm it, just to knife him.
I searched the knife psycho stats and I couldn't believe when I saw that he had 6,000 plus knife kills. The knife was his second best weapon. He had a negative K/D, and W/L, but his dog tag list was endless. The site couldn't list all his dog tags, he had too many.
Prone will only make more difficult to hit some people, but if you hit then, it will be easier to get a headshot, as they will most likely be stationary or moving very slowly.