Not everyone involved in Tor and the surrounding community is a cryptographer who uses PGP regularly, or even at all; AFAIK Jill Baeh is not.
In any case, basically you'd be saying that Twitter and/or her Twitter acount is compromised, as a few others are interacting with that account, and have been following her since well before the tweet (I personally know many of the people in the conversation around Jill's tweet). In the unlikely event this is true, I think we'll find out soon enough. edit: I personally am a Bitcoin dev who uses PGP regularly, and in a similar situation even I can see myself being lazy and not signing my statement.
tl;dr: I'd be happy to bet a beer that the Tweet is authentic. :)
OK. I won't take that bet, because you're probably right. :)
I'd still like a more general solution to determining the authenticity of statements on the internet.
In practice, people use Twitter for that. Seems weak. But, I don't use twitter, so I'm disregarding the community trust aspect that you described. Maybe it deserves more respect that I'm giving it, but we do have PKI available...
In any case, basically you'd be saying that Twitter and/or her Twitter acount is compromised, as a few others are interacting with that account, and have been following her since well before the tweet (I personally know many of the people in the conversation around Jill's tweet). In the unlikely event this is true, I think we'll find out soon enough. edit: I personally am a Bitcoin dev who uses PGP regularly, and in a similar situation even I can see myself being lazy and not signing my statement.
tl;dr: I'd be happy to bet a beer that the Tweet is authentic. :)