Suggest to perform automatic checks for cross-posting (including deleted SO cross-posts, like this one for example) and question block / warning at Stack Overflow when post enters close queue, not only when it is attempted to migrate.
If check detects a problem, system would raise automatic flag for moderator attention.
I expect above preemptive checks to help us more efficiently address attempts to abuse the system.
Related:
Annotate user accounts network-wide when they get rate-limited or banned
A few of the migration rules are skipped if it is a ♦ moderator clicking the button, however: the "is the user suspended or blocked from asking" is always applied.
- Stats on how attempts to circumvent SO question blocks impact other sites
working on a design for enhancing our our recidivism system to discourage this and other sorts of unproductive behavior...
- Stats on how attempts to circumvent SO question blocks impact other sites
Check to make sure a duplicate does not exist before migrating
A migration will be rejected if...
- ...An exact, word-for-word duplicate already exists on the destination site, or...
- ...A question created within a week of the one being migrated exists on the destination site with the same author and very similar body text.
Moderators can override this restriction...
At smaller sites, penalize hot questions having 3-4 close votes
At smaller sites... closing a question takes hours or even days...