Well the title says it. Should I answer a question that is technically (or blatantly) off-topic if I know the answer? Example: This question got a downvote as well as multiple flags from me. If I can just answer the question so that the user will be satisfied and go away, should I?
The simple answer: no
- you cast a close vote against an appropriate category.
- you can also then downvote.
If the question is likely to be migrated to another site, answer it.