While playing on egg wars my friend and I found a hacker that caused a lot of trouble for us and other players. Sorry for the lengthy video. If you want to skip through it the best bits of evidence are at 13:50 and 14:35. From what I can see he didn't have knock back, could run while crouched as well as run and aim. Maybe even kill aura but I don't think I caught that in the recording.
His name was L1_L1ckme
His name was L1_L1ckme