I think your answer is appropriate for this case, because it is a user that has repeatedly asked similar questions with general poor samples. So as you mention, for exceptional cases, yes. Something I don't like, though, is the idea of having this answer practically copy-pasted over different questions. I would however use a different tone for new users.
Font-identification questions are probably something we'll always have around unless our scope changes. Some of them add no content and are generally un-traceable, other can be challenging and even enjoyable. I think we should definitely always point to a font-recognition service first (at least to the tag description), and using comments.
There has been some discussion on the subject, although these threads might be a bit old. Maybe we need to re-ask the quesiton of font-id: on or off-topic?