I'm on GitHub because we release the sources of our clients and because we use several open source libraries in our stack and it's very impractical to push changes upstream if you don't have a GitHub account.

I could certainly do that anonymously, but again... tradeoffs. It's more convenient for me to do it from my primary account (which makes me more likely to do it) and there are advantages to publicly sharing that we give back to projects that we use.

Do you think someone doing a recon on a target like a developer at Silent Circle _wouldn't_ check for a GitHub profile?

EDIT: Dunno who is downvoting you. You raise very valid points (ones that we have had many conversations about), and have been very cordial...