First of all, unlike Stoker’s Molotov, there is no ally vs enemy smoke differentiation! Granted there is no damage involved, yet it’s important to know if you’re running in the safety of your ally’s smoke or the death trap of an enemy Red-Eye. As well as wasting sticky bombs trying to blow out an enemy smoke, when in fact it’s your ally’s.
Second, Red-Eye smokes need to keep a sort of outline when in infra-red vision. Otherwise there is no way for Red-Eye to know if his smoke has been blown out or where it even is when he has his power active.