Many people have accounts on those forums to keep up with what is going on and try and stay one step ahead of those who are cheating, is not always because the people are actually using cheats. On the basis you are assuming we should be suspect of you because you have also been to those forums!
The score is achievable it might be a reason to put somebody on a watch but is by no means proof of cheating.
I have played both those names on the servers never had any reason to think they were cheating on those occassions. Doesnt mean they dont but I havent seen anything dodgy.
I am not sure what you mean by blue box on the screenshot on his xfire profile if you are talking about the killcam screenshot that shows the green and blue graph then that is the connection to the server called lagometer and is a valid tool built in to the game.
I think you taking things a little too extreme enjoy the game.
Yeh I still say bring punkbuster online just for a week to see if it makes any difference to the amount of accusations/kick votes and jsut dont tell anyone.