Hello,
I remember your case. You were pissing off all server with your mortar all day long and were pretty proud of this, taunting other players.
That's because of players like you that we modified the server. Indeed it's no more possible to stand mortar in protected areas, was too unfair.
Also, the rules changed and you'll find rule 18 covering the fact that it is no more allowed to exploit mortar the way you were doing it.
I don't know what happened for your kick but I believe the admin who kicked you already had in mind your past behavior with this mortar and your proud intention to piss off all server with this weapon. We don't tolerate such behavior anymore, fun is for everyone, not only for you.