One of the biggest stars in gaming is calling for the company behind "Fortnite" to reconsider its LIFETIME ban on FaZe Jarvis ... telling TMZ Sports it's just unfair.
As we previously reported, 17-year-old Jarvis -- one of the top players in the world -- admitted to using "aimbots" (illegal software) to cheat at the game.
Epic Games immediately issued a lifetime ban against Jarvis -- and told TMZ Sports they have a "no tolerance" policy when it comes to cheaters.
So, when we saw KSI leaving the Belasco Theater in L.