invisible fb and fw come from off screen and kill ppl not good idea x.x
i think what LP meant is that it would work only for you and its only ur choice if u wanna see those animations of poison or not at the specific time(something like
/effect off or
/weather off works like)... also not for all so they can turn it off so u cant see their fb or other spells that they cast at you

(if it is about other players) ...
I think its a good idea..