So don't take the lack of publically disclosed evidence as an indication that no evidence exists, because it isn't.
It actually is, in the sense we use the term here.
Exactly. One must be careful to distinguish between "this is not evidence" and "accounting for this evidence should not leave you with a high posterior".
Some research says that lurkers make up over 90% of online groups. I suspect that Less Wrong has an even higher percentage of lurkers than other online communities.
Please post a comment in this thread saying "Hi." You can say more if you want, but just posting "Hi" is good for a guaranteed free point of karma.
Also see the introduction thread.