Holybed | 7 years ago | on: Private by Design: How We Built Firefox Sync
I'm not sure account age is so relevant. I create new accounts all the time (several times per month) even though I stand behind what I write. It takes 15 seconds so hardly a big effort. I've noticed that it's possible to extract a lot of info from people's posts, in many cases deanonymizing them if you go through enough history and correlate with other sites. Maybe he is a bit privacy concerned.