ekobko, You were banned because as we Moderators look through the worlds, we find stuff destroyed. This leaves us with two options. 1. are you on the server? If not, then we have to either a.)hope you don't log back in and grief more while we search you out on the forums or b.) ban and then search. 2. If you are on the server, give you a chance to repair the damage done.
In your case it was 1. b.
We found some rails that were destroyed back in July in survival. Do you remember anything about this?