A guy on the Consortium forums reported that he was hit with a 72hr temp ban for 'using 3rd party software' for using TSM to post options. If you haven't used the addon TSM, basically it allows you to setup groups for your items to sell, it then scans the AH and posts the itmes.

Note that for each item you post you must 'click' a pop-up button confirming you want to post it. This is easily macroed, and most people (myself and the guy who got banned included) bind it to mouse wheel up/down, thus in about 20 seconds of mad scrolling you can post 1000s of auctions.

He appealed multiple times but had no luck at all, seems their new auto-flag systems still need work.