Without that thing, it wont help to solve bugs with spawning, like you teleport under map or through it, so, eric, you must do it, add this, and all problems with spawns will be solved finally.
Deathmatch area is where you will spawn at, while it's dm gamemode, or tdm.
Many maps had that bug, will be fixed by it, i dunno why eric didn't already add it to pb2.
If you created the map with like 1 room small area, and u spawn there, it doesn't means the bug is fixed, or something, if there 1 more player joined, it will happens.
On my mind, it could be really usefull.