Make it to where explosives kill enemies, teammates, and yourself. It makes no sense to have a grenade land under your teammate and they just act like nothing happened. Also, with claymores the same thing that sets off a claymore (the lasers) will be tripped by a teammate or yourself just the same; now there could be a feature that you can step around the lasers by holding a button and walking in the direction but you should not have your gun out since you need concentration to pass by it. Same with C4, RPGs, stuns, and flashes, if it blows and a teammate is there they should die. In reality there is no explosives that kill only enemies.