Remove the template. The point of a template is to notify others to fix the page and then remove the template. Just putting that up there isn't going to prevent anyone from posting spam links if they are so inclined. It's possible that some people may be adding links not knowing they are adding spam, in which case I think it would be more effective to add a comment in the code to tell people that they should post their links here first for approval, or to not post random links, etc.