User blog comment:Dopp/Technical Update: January 10, 2012/@comment-460966-20120116204019/@comment-3235402-20120117182221

You can't just remove it from all wikis. You can add some things to your global CSS, which will make it disappear only for you, but on all wikis.

@Dser: Can we get it to disappear only in a specific namespace?

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