User blog comment:Brandon Rhea/Bringing down the banhammer: Best practices for blocking/@comment-1318845-20120316203413

I'd also like to point out that if you think a fellow admin's block was unfair, you can always unblock the blocked user and ask the admin what they were thinking. That's why it's helpful for wikis to have more than one admin.

Oh, and try to avoid blocking IPs for a long time. They might be rotating you know. Usually a week is enough, at the most two months. ^_-