I don't think we should get too nepotistdespotic about these things. Ultimately any question has to fall into "we can deal with it" (be that with edits, as in this case) or "this really should be somewhere else".
On the face of it, I don't think we should treat any tag with any more leniency or we face getting bogged down in rotting questions.
But I do see the problem. We have people with issues that should be elsewhere (ege.g. a bug report) but rather than just closing the question, we should still aim to help them, even if that means helping them get help elsewhere.
Ideally we'd have a "Belongs on Launchpad" close option that both explains why something might need to be reported and (better yet) how to file a bug. This seems like a minimal feature to me (and much simpler than the fuller "Migrate to Launchpad" option that we've talked about before).
... But how do we go about getting this implemented? Has this been suggested already?