This excellent thread reminds me of a situation a year ago where an "online celebrity sub" shot and killed her Master ...
* the dom was known to be playing with two women with admitted mental health/self-esteem issues
* he bragged about his knowledge of psychology and ability to use psychological techniques
*and his online journal nick was, with a bit of semiotic analysis, a clear declaration that he enjoyed toying with the mentally ill
... interesting ... I could go on, but I'll stop there.
(protecting my head from incoming bullets ... hey at least I didn't use names!!)