Ok, so around 9:47 at 2/24/2017 some guy named NOT_A_HAXOR27 came online (in kitpvp), and had an insane client... and when he got autobanned, he came back onto the server with the username NOTAHAXOR27, similar to his previous one, except this time without underscores. I confronted him and asked VargasAxer on kitpvp (a mod) if this was ban evading... he agreed and told me to report NOTAHAXOR, and NOTAHAXOR said he couldn't be banned and that gc can't change ip or whatever... dunno what he meant, but what I do know is that he was ban evading and I have a mod to back me up here.
Might've gotten the "NOT_A_HAXOR27" one wrong then... :/ ask Vargas... I think he knows, or is it possible to check recent bans on certain servers? cuz if u check kitpvp's whitelist... a similar username will probs be there