I have heard of this, yes. I think for a lot of people it helps validate the intensity of their feelings, to underline the reality of their pain.

I have taken photos myself and thought about using them as a means of bluntly confronting others with my pain. In a couple of scenarios i fell short of better judgement but luckily it's something i know not to do again.

How does your T feel about you taking photos? Do they feel it reinforces the addictive nature of this issue? I'm just curious. I'm sure a professional has quite a different take on the issues surrounding SI.