Hi, I just got this ban called "Eye Test Violation (Roll)". To be honest I don't know what it means, please explain to me why am I banned and what did I do wrong.

I played a PUG game last Thursday (Feb 13) then I decided to quit the game because of visitors coming to my house, but before I leave I said to the chat that I am leaving and need someone to sub for me, then I quit.

Current IGN: Magina
Steam ID: STEAM_0:1:30967537
Reason: SMAC 0.8.5.0: Eye Test Violation (Roll)
Status: Permanent Ban

Also, I am a noob here. Thanks
(I like to put some colors and efforts in my post on forums.)