Upon testing I noticed a couple things, firstly
If you fall,jump or get knocked down into the "abyss" you should die and re-spawn with a timer at the nearest graveyard dependant on what base your team owns and where your corpse died.
Retail vid:
( 6:50 ) onwards
Second of all with this "teleport" feature if a player has the flag and jumps down he will teleport to his base with the flag and making it easier to cap the flag.
( My suggestion would be that if you cant make it so the player dies when he jumps or gets knocked down is to reset the flag if the flag holder goes through a loading screen. )
Another reason why it is semi important to make the player who jumps down die instead of being teleported is the iron man achievement is very easy amongst other achievements being easily obtainable. And it's fun to kill people that way and easy honour :P