Viewing BDSM as an enactment of or outlet for past trauma places it squarely in a category of deviance, as well as (wrongly) categorizing all practitioners as broken or scarred. BDSM is a sexual or relationship preference, not a method by which individuals subconsciously choose to heal their childhood feelings of shame or rejection. For some good reading on this subject, see here: (more academic) http://kinkresearch.blogspot.com/2010/01/childhood-abuse-as-etiology.html?zx=3729fe5f2b90bf6e and here: (more informal) http://www.news.com.au/breaking-news/bondage-lovers-normal-maybe-even-happier/story-e6frfkp9-1111117296864.

In terms of 50 Shades of Grey, the main character comes to perceive his actions as abusive because they are. As a community, practitioners of BDSM are not thrilled about 50 Shades because it represents neither a healthy BDSM relationship nor the massive and beautiful variety of people and preferences that ‘BDSM’ encompasses. For some excellent writing on this topic, see here: http://www.crushable.com/2012/07/30/entertainment/fifty-shades-of-grey-sexual-assault-bdsm-603/ and here: http://www.sexualityresource.com/sex-therapy-nyc-fifty-shades-of-grey-part-2-some-general-cautions/.

In addition, the acronym BDSM is more than the sum of its parts: it actually stands for bondage, dominance/submission, and sadism/masochism. If you use the acronym, particularly on a well-attended blog where it may be a somewhat unfamiliar term to a many of your readers, please use it correctly.