I often wondered why people do it, and agree with the reasons for being for and against it.
I am too lazy to do it myself, though if I did, I probably wouldn't see too much of an issue. My diagnoses are on my profile anyway.
In terms of being attacked by someone for what it is I have to say, and knowing my "weaknesses," I really don't care. I can utilize my "weaknesses" as a strength. If you think someone is already crazy, why mess with them?

But I digress. I'm in a much better place now than I was when I first joined almost six years ago. Things roll off ^~^ #rambles