I was looking at this site and was a little bit surprised at this statement:
It is therefore forbidden for Jews to teach non-Jews Halachah
If this is true, should it be a concern here on Judaism.SE?
(See the related question on the main site)
It seems from the answers to the Main question that at the very least, we have sources to rely on when we present Jewish law to the public. In addition, it's quite clear that this is a common practice in virtually every part of the Jewish world that allows Internet use at all. I think we're fine.