It might be an idea to allow users to migrate their own questions between sites. This can for example be allowed when all the following condition match:
- The question has a maximum of X up-votes (for example 5)1,
- The user had a minimal reputation of X on both the source and the target site (for example 1.000)
- The question is not older than X amount of time (for example a week).
Sometimes I see questions that will fit way better on another site in the Stack Exchange family.
Any thoughts on such a feature?
Also a badge can be created for the first move and maybe others related to moving.
Note: The threshold will be high, because a certain number of reputation points on both sites and the amount of votes and question age will limit the range of questions that can be self-migrated. Therefore it will prevent users from massively starting to migrate questions. The reputation makes self-migration a privilege to be earned.
1. Upvotes only because a question is likely to be downvoted when asked on the wrong site. And unlikely to be upvoted on the wrong site.