I think this is a very useful bit of information you've dug up. I don't think any of the links connecting Bruce to mybitcoin are hard proof, in either direction, and if Bruce isn't connected to that particular mess, then that's something I'd rather know.
I agree that his reputation has been thoroughly tarnished, but that doesn't mean that we shouldn't look for more information, either incriminating or exonerating.
Sunshine is the best disinfectant.