Before he sent the message to him he made a thread in the suggestions/comments section asking if he would get banned for sending a message to someone outside the forum voicing his opinion.
Several mods responded stating he wouldn't get in trouble for sending a email outside of CF. After he did he got banned for what everyone said was alright.
I'll see if I can dig it up here.
Edit: Here is the thread which he asked if it was alright and several mods said it was not a problem or against the rules. So much for that.......................
http://www.computerforums.org/showthread.php?t=66391