Board Thread:Support Requests - Getting Technical/@comment-5079138-20151002114203/@comment-957747-20151002174343

Also, you're doing this for NS:4. That would be very confusing for a lot of users. There are ways to streamline the namespace instead (to PvZFF Wiki:) or similar by simply changing $wgMetaNamespace (contact staff to do this).

I highly discourage you to hide it completely and come up with another solution to have something visible. To your users, there would be no difference from a page in the "Project" namespace compared to those in the "Main" namespace.