In the interest of being considerate of users who come from a variety of religious (or non-religious) backgrounds, is it right to use BC and AD to express dates or should we use BCE and CE instead? Or does it matter?
Some people posting here are posting from a relatively neutral, text-centric, point of view. Others are posting on subjects, or with interpretations, that are definitely from some tradition. It's clear that there's plenty of on-topic room for such posts.
I have no interest in asking people posting questions with a distinctively Christian flavor to hew to a neutral line on dates and books. In the extremely unlikely event that I ever answered a question about NT, I'd probably refer to it as NT if a reference was required.
On the other hand, if the posting at hand is a relatively neutral exploration of text or history, then I would encourage people to adopt the neutral terminology as part of creating comfortable space for non-Christians. "Encourage" -- not "require", and certainly not "edit".
A somewhat tangential point here occurs to me: if someone asks a relatively 'peshat' (plain textual meaning question) about Hebrew Bible, I have mixed feelings when an answer shows up that is chock-full of doctrinal interpretation. I wonder if there's any sympathy for a view that simple textual questions look for questions that stick to the linguistic problems of the text.
I think it would be more inconsiderate to impose a rule mandating either than it would be to simply allow for both. As a new user I would find it far more irritating to write a question and have it immediately edited to remove references to BC/AD or BCE/CE in exchange for the other. By creating a rule, you're imposing a particular culture's nomenclature (whether Christian or otherwise) onto everyone, which is more imperialistic than a particular member of a culture using their own nomenclature.
I certainly don't want to impose a rule upon our Jewish users that they should use Christian conventions; nor would I want to impose a rule upon our Christian users that they must adopt conventions different from what they might be used to.