Well, I think you're wise in not wanting to leave an e-paper trail. A LOT of employers will run a search or two before hiring you. You don't want to leave anything that doesn't fit with the Doc you present at an interview.

That being said, I'm not familiar with Fetlife, but are you using your actual name? If it can't be traced back to you via your real name or your screen name (ie if you're DrSkipper EVERYWHERE, and people know it), I don't see the problem. If it's traceable, then I may perhaps reconsider posting it, or at the least omit my name or adopt a false name. I understand Jane Doe is a very prolific writer on a vast field of subjects...