I know that it can be a pain too be wallbanged, i do it to, but i see it as a part of the game.
If i person is sitting in a window, only head is clear, and he starts shooting at a player in the open, you have to be a good shoot to take him out,
and therefor i think it is an unfair advantage, and the perk you have choosen is no good.
Ofcause it is the same for all, but still