I have to make some points here:
1. When you say sorry, it doesnt mean that you cant get slayed, kicked or banned. It depends if it was on purpose. Plus as I heard, the situation was a bit different than described. However, it was "normal" teamkilling as in hundred unban requests before.
2. I dont believe that every regiment leader has made a teamkill on purpose, but even if so, it doesnt mean that you are entitled to do that too. I dont like my neighbours. Can I go and kill them, just because other people commit murders? I dont think so.
3. Megaberna is not making up rules. It is true that repeated ban can get you ban permanently, even though the offence in question is not so serious.
4. However, in this specific case it is different. All those bans are from unofficial servers and therefore I do not care. I cannot accept the presumption that if someone is banned from unofficial server, it makes his position worse, when he gets banned on the official server. I supervise admins and their bans on official servers and therefore I can guarantee that if someone is banned, he is banned rightfully. I cannot guarantee that on unofficial servers. I dont say that he didnt deserve those bans, as far as I am concerned he did, but that doesnt change anything on the principle. Also, it would not be fair if I took those bans into account. You know that he was banned on those servers, because he asked for unban. It is possible that we have more people asking for unban, who were previously banned on other servers, but we dont know, because they didnt ask for an unban there.
This is usual unban request for me, where the problem is teamkilling. Unban on 30th September, bump this thread on that day.