well its sumthing like taht but not for pms...its when u start a topic a aotumatic first post is made by a bot and the post is not counted and u could control what the bot says... I ve seen it on a board b4 but that board had been removed..
EDIT: after doing a google search here is the link to what im talking about although as you will find out the mod i was refrering to was only made for ipb but even though, is therea mod that makes a box like on this forum that im linking to where you can place a google ad?? (if theres no mod can someone tell which file i would ahve to edit for this effect to work???) http://forums.digitalpoint.com/showthread.php?t=13272