1) GG grenades, not OMG
Switch throwing 'nades from simple G to G+G (double tap). it's a dangerous toy. And it happened to everyone.
2) check CAPS
actually, nevermind caps lock state. but change it from 'transmit on current channel' to 'group chat' (which is the one you actually want to use) and assign '4' for vehicle and '5' for direct. that way you never gonna spam side/command again.
3) Y u mad?
Unmap Y (Zeus). Simple. You don't need it ever and it only will get you into troubles.
