I am seeing an increasing number of stories in the media where schools are recommending against, or even prohibiting, the discussion of sensitive issues, such as depression, suicide, sexual molestation, PTSD,etc, because discussing the subject may 'trigger' a negative response in those with experiences with the subjects. I find this trend disturbing. I am not aware that such a phenomena exists based solely on discussions (I am aware of some responses by those with PTSD to certain sounds or sights, but not discussions). This trend is stifiling in the schools open forums on very serious issues that young people need to be aware of and educated on. Is there any research done, or in progress, on the 'trigger phenomena'?