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This very kind person has outlined the correct procedure to follow when reporting a player.Remember that a ban dispute is for someone who got banned, and believe they should be unbanned, and from what I can see, is that you are intending to report a player, remember that you need to report the with the evidence, following the format in the "Report Abuse section". You can find it here:
http://www.minecraftsurvivalgames.com/forums/Report/
Also, please remember to follow the format provided for you, which is found here:
http://www.minecraftsurvivalgames.com/threads/report-abuse-templates.6742/
The evidence seems legitimate, so good luck!
EDIT: Also, I request a lock, since this has been posted in the wrong area.