Hai. So I made a command that creates a killzone below the map. Then I took a piece of another addon that toggles the ground on and off, and added that in as well. Cause it's pretty pointless if you don't do that. Ssssoyeah enjoy.
Commands:
/deathzone # # # - type in x y and z to make a deathzone of whatever size. The zone is located 10 units below the map. Type /deathzone again to remove the zone.
/deathzonehelp - displays the help message
/toggleground - toggles the ground (duh). When you toggle it back into existance the ground will be completely transparent. Give it some sort of texture to make it visible again.
Download:
http://www.mediafire.com/download.php?c61biz0sv92hae6If you're curious as to where the deathzone is centered, you can use the console command
findclientbybl_id("YOURIDHERE").player.position = "0 0 10";
to position yourself above it.