You ask in the thread title "Why am i banned? :O" when you already know the answer :s
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i was swearing to myself and not at someone
If you were swearing at yourself , why bother to type it into the global chat , do we all need to see it ?? ... and its not the first time you've done it , this is why you got the ban because you know the rules as you agree to them every time you connect to our server .
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banned for 7days...etc reason crashing
It doesn't say crashing it says "bad driving" i'm guessing it must of looked pretty bad as like you say your "wheel was playing up" ... if you cause a crash its better to acknowledge the fact and say sorry instead of swearing , all of the admins here take a dim view of unsportsmanlike behavior and don't give out bans lightly .
I will unban you after you have agreed to our SERVER RULES ... i only give out second chances as everyone deserves a break once in a while , BUT if anything like that happens again it will be a permaban with no chance of an unban .
Once you have given your reply about our rules then i will unban you .