Not likely to happen. All admins are to understand that if T's are standing infront of there friend with a gun, then they are fully aware that they will be caught in the crossfire and therefore it's the T's fault for deciding to be a shield. If an admin doesn't see that and decides ban because he broke the shield over the gun, then they need to be shot.
The term freekill should mainly be held to CT's that take shots at T's running around for no apparent reason and CT's wiping T's out when there is no gun among them and noone has taken a stab at anyone.