When a thread is restricted can you set things up so that it is impossible to post a reply on it?

I find that when I see a post on a generic list of uncategorized recent posts I often visit them and pay not attention to the forum... if I then post a reply where the rules otherwise forbid a reply by a generic users (e.g. a support forum), then someone has to come along and delete it.

If you simply make it impossible to post then that problem would never occur.