This wasn't actually me that got banned, but a friend of mine on Minecraft server got banned for having too much power. Let me explain. The server had a guild plugin that gave players the ability to claim chunks for their guild, and use those chunks for whatever. The number of claimable chunks was dependent upon the number of members in your guild. His guild suddenly surged in popularity over a month that one of the mods was offline. My friend had gained enough guildmembers over that time that he ended up with over half the map claimed for his guild. When the mod came back, he thought my friend had cheated somehow. It did get resolved, my friend was unbanned, and the mods had the guild split into smaller guilds.