Would it be possible that players lost their ability to hear for a while, or become deaf if a grenade hits near? It would make the game much more realistic since grenades dont do any harm from a distance now.
I like how COD4 handles the flash bang grenades.This is actually a good idea and I don't believe it's been discussed before.
Although, I think that it should only happen if a grenade explodes near you while you're in cover so that if you don't die, your ears are ringing; it shouldn't deafen you from across the map.
If it's possible coding-wise, it'd also be good that it deafens you for a longer period of time if you're in an enclosed space.