As mentioned in a comment, deleted questions count towards a question or answer ban.
I'd start by reading this Q&A about the automatic Q or A ban, then follow the link to the meta.SO question if you want even more information.
I don't know how ServerFault compares to other sites for migrations, but because we used to be subjected to crap migrated from SO, many people vote to close questions as off-topic in preference to voting to migrate. That's as it should be, it's better not to migrate a question unless you're certain it's a good fit for another.