Thanks and a hat tip to Marty......
#WhyWeDontEngage is a Twitter hashtag that people in our community use to describe in a Tweet (140 characters) why they individually don't engage with the treatment system. The Tweets are personal, but you can access them if you have a twitter account or use a Twitter client like Hootsuite by searching with the hashtag #WhyWeDontEngage.
One participant has helpfully "storified" the hashtag tweets at http://sectioneduk.wordpress.com/2014/12/19/whywedontengage/ if you don't have a Twitter account.