When TF2 came out last September, there was the hole that allowed people under the map in Gravelpit.
We edited the server map to include a death zone at the hole. So if any exploiter tried to get under the map, suicide would happen.
Badlands also has a hole allowing would-be exploiters to get under the map.
TV1, TV2, TV4 and TV7 are all running an edited version of the map.
The Corner of Death is back.

Let me know if people start complaining of "WTF....? I just died...."