Halo 4 had a glitch where you could force spawn with a gun while infected and killed mom infected players. Was a ban-able offense. Battlefield had a couple. Mav elevator glitch, exploding the ground to phase into it glitch etc. we're ban-able. Cod mw2 had a couple. Like infinite care package, making your ac-130 fire the biggest gun over and over with no cool down javelin glitch. All ban-able. Hell destiny handed out temp bans to people who used the unlimited ammo exploit in pvp. And glitch/exploit is a ban-able offense according to tos. Just because some companies don't crack down on them doesn't make them not ban-able offenses nor does it make them okay to do.