A bit off-topic, but now you mention the respawnroom_visualizer...
Something that bothers me is that just about all the custom maps I've played have had the visualiser on the outside of the spawn room, while all the VALVe maps have them inside, except cp_badlands. Why is it that people have decided you should see the big ugly red "No Entry" symbol all the time?
I think you should really only ever see it if you try to enter an enemy door that's been opened.
I use em so people know from a distance that the room is off limits....
Plus I don't want people opening spawn doors to enemy's spawn. Yes I know you can put a filter on the door, but why go through all that, just make it so the visualizer is one unit outside the actual door.