It seems to me as if almost everyone here does not have an undetectable/working hack... so does anyone know a way to grind certs without being auto-banned?

EX: 2 sunderers, 2 different empire players -> kill/respawn/kill/respawn (tried this with my friend, detected 3 day warning ban)
EX: 2 friendly engineers -> ammo pack (stops working for 5 min. after 1.5 certs) [Vehicles included]

Anyone know an efficient way to farm [undetectable]?