sm_fortressblast_spawnroom_kill is a ConVar in Fortress Blast. It was added to Fortress Blast in version 2.0.
If the ConVar is set to 1, every player that goes inside the enemy team's spawnroom will be immediately killed. This is necessary to prevent exploits with Shock Absorber and Mega Mann that would otherwise allow players to go inside the enemy spawn. The ConVar can be set to 0 to be disabled, for gamemodes such as VS Saxton Hale or zombie game modes in which going inside the enemy's spawnroom is to be expected. The ConVar was set to 1 by default from 2.0, but since 4.3.2 this has been changed to 0.
This ConVar is deprecated and will be removed in a later version.