There are really really dumb mod coders using the Bukkit Plugin Channels to send messages to the server. Whenever these really dumb coders don't know how to code the server console gets spammed to hell from the bukkit's plugin channel system.

https://gist.github.com/RingOfStorms/9a86755d83de878636c7 This error was spammed every single time a dumb kid with a dumb mod called spectral guns (http://www.planetminecraft.com/mod/spectralguns/) joined the server.

In short, please suppress these errors or simply make the plugin channels ignore messages from really dumb moders. There is literally nothing we can do to fix this besides banning really dumb kids who use really dumb mods.