Interesting thought - if that were true, what would that make all dominants?
;-))
But I agree with many here - not many people go through life without picking up the odd mental bruise and lump. Part of being alive, I think.
As for actual damaged goods:No.
There have been enough research on BDSM people to show that we have the same percentage of crack heads and normal people as in a comparable group of vanillas.