I will answer your question with a question: if you knew it was wrong, still did it, been playing for so long and still did it, why did you do it? A couple of players, or a full server, it makes no difference. It affects players all the same.
Honestly, the way it was reported was right down to the letter, it even showed in the event log code. As I said, our rules exist for a reason. This is not -[HELLO]- Bfv | Allmaps v1.21 free for all.
The aggressiveness in your attack shown in the event log was very untoward. Also, not only was it rotten sportsmanship, it was unwarranted.
I can barter and say I'd knock it down to a 1 day ban. However, you have clearly stated you knew it was wrong. This community has fought very hard to keep our rules enforced, therefore your ban stays.
If you choose to return, please remember our rules. The fact that there were "only a couple of players" is an irrelevant excuse.