I have been using this map spawn editor for a few years and it works perfect, except from one problem, it has a issue together with any Bad spawn preventing plugin.
The damage isn't even detected in Post, but in Pre it is, when you are using this map spawn editor.
It does not work to prevent from killing the player anyhow.
If any alive player cross a spawn point in the middle of the match and someone join the team that spawn point belongs to, it will kill the player crossing it.
It works fine without the map spawn editor plugin if you ripent the map and add these spawn points manually into the map to let the game create them - which I would like to avoid.