My server was banned for spoofing, but why?

[overclockgames]

This server is currently banned! Reason: Spoofing data info (Type: #2).
Server will be unbanned after 10/03/2013.

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Had a player wanting to be Top Sword, but I've decided to put un and anti-spoof site here, did not know it would result in banishment.

 

[SeRoN]

same!
My OT
This server is currently banned! Reason: Spoofing data info (Type: #2).
Server will be unbanned after 10/03/2013.