Thread:Project:Support desk/Hiding the User Creation log

I use the Javascript enhanced Recent Changes and find that on an active wiki, the User creation log gets annoyingly big near the end of the day. Is there any way to force close the "javascript arrow" for just the User creation log while keeping all other changes shown/open or just simply hide only the User creation log? I would assume if it was possible, some sort of .css or .js trickery would be involved.