The blogs are down so I'll put it here; it's still appropriate.
"Recently, lots of members have said they don't know when to expect a warning, so the system has seemed unfair. Let me set the record straight today with this master list of everything you can get warned for.
Moderators on ATRL decide to give warnings subjectively on a case-by-case basis, sometimes based on reported posts and help requests, and sometimes based on their own findings. Our moderators have the sole judgment to give warnings for anything they wish. They also have the right not to warn members if they don't feel the need to.
You can check your warning status by clicking your user name at the top of the page and then the "Warnings" tab.
Note: ATRL has ONE thread that
are isn't moderated Stand Your Ground in Base, which may be exempt from these warnings at the discretion of the moderators."
Okay sis
Source:
http://atrl.net/forums/showthread.php?t=73622