Ratpack and Chalenge, I think your missing the point.
Example: Me and Eric are 1k apart on open ground with a wall of smoke between us. I cant see anything apart from a wall of smoke, Eric can see me perfectly well. I can't kill him because I cant see him, not only can he see perfectly well, he can also take his time to line up a shot because he knows nothing is coming his way. If his first round doesnt kill me, I now have a rough idea which direction hes firing from, a couple more incoming rounds and I may be able to establish a line, but not range (I cant see my rounds land either remember.) He is effectively cloaked.
I wonder if without the exploit he would still be "One dam good GVer" ...