I've never seen the text activate on the dungeons I've created and run to test. It's really irritating that when I create the dungeon, I put numerous mob chat events to let people know that I would like to hear about any problems or improvements they see in them so that I can improve the dungeon and make it more appealing. Nobody sends me a tell or mail about potential feedback since they probably assume it's posted and done, and nothing is going to change even tho I name them test 
Some text messages in the dungeons are fluff for atmosphere others are informative and some request feedback but no matter what triggers I use, they don't ever seem to appear.