At Jon's request, I am expanding a comment into an answer.
I became active on Biblical Hermeneutics early on and am currently the #2 user by reputation. (It's not a large site.) There are a lot of questions that don't apply to us since they consider Christian books too, but it seemed like I could provide useful Jewish answers to Tanakh questions, and since the site claimed not to have a doctrinal basis (as noted in this question, and also in the site's "about" page and numerous places on meta), that seemed like an ok thing to do. I've gotten positive feedback from users who only ever learned the Christian spins on our texts and didn't learn any Hebrew along the way. And I've learned things. There are some smart, educated people on BH.
However, I no longer recommend this site for Jews, and am reducing my participation. Why? Because that doctrinal/dogmatic neutrality hasn't worked out in practice. Despite the charter, and despite a massively up-voted meta post saying "Any discussion of beliefs, doctrines or theology belongs on Christianity.SE", too many answers (and sometimes questions) assert Christian truth claims that are decidedly un-Jewish (and counter to the Tanakh), and efforts to move them toward neutral statements are rejected.
This wasn't always true, but it started late in 2012 and has continued through this year -- the period of time that coincides with @Jon's reduced activity on the site. In retrospect I realize that Jon was the skilled diplomat, the voice of reason, and the conscience of the community. (Also the #1 user.) I have been completely unable to carry that torch for the site despite my best efforts.
As I wrote in a recent meta post there (asking about barriers to Jewish participation):
Since most people here (and all moderators) agree with those basic assertions of truth (if not all the details), they don't see the problem even when someone objects. To them it's like saying that the sun rises in the morning. To people in this group, doctrinal assertions in posts add character and couldn't possibly do any harm. [...]
I came to teach and learn in a classroom. But people brought in an altar, crucifix, and communion wafers, and the custodians gave them directions.
I had a realization on Rosh Hashana during the shofar service when I read the "arise, you slumberers" Rambam passage including "you are wasting your years in vain pursuits that neither profit nor save". That seems to apply to my Jewish voice on BH. It doesn't seem to be profiting or saving anybody, and it's possible I'm actually doing harm. (See the linked post for more.) So while I don't yet know if I'll leave the site entirely -- I need to spend more time examining the situation, and probably consult my rabbi -- I certainly can't in good faith contribute any more answers so long as the doctrinal status quo continues.
If the site can be turned around, returning to its neutral roots as proposed in this very thoughtful, recent meta post, then I'll be happy to contribute there again (and will be delighted to update this post). I'd really like that to happen; I'd hate to have wasted all that work. Right now, though, the site is C.SE Lite, and that's very uncomfortable.