This guy asked about elementary OS. I voted to notify the moderators, I commented letting him know it's off topic. But why didn't you migrate it to superuser or unix.se?

I'm not trying to defend him. I'm trying to follow this rule written under the mint tag, it clearly says:

For questions about Ubuntu that mention Linux Mint, an unofficial Ubuntu derivative. Most questions here are off-topic and should be migrated to the Unix & Linux Stack Exchange site.

So why didn't you just migrate this one instead of closing it? if It's low quality Superuser or Unix.SE then I'm sure they can close it too.