I've seen a couple of legal questions (mostly related to copyright) on this site, none of which specifies the jurisdiction they ask about. Since even basic concepts about copyright have vast differences in different jurisdiction, such questions cannot be answered. All answers I've read so far implicitly assume one jurisdiction, usually US jurisdiction. What are we supposed to do with this kind of question?
I would recommend that these be included in posts, but I wouldn't require it.
If you feel that the jurisdiction is important, downvote, and leave a comment for the author to make note of the jurisdiction in cases where you think it would be necessary.