AC was disabled because people kept getting kills by simply going in a corner and spamming the explosion, dealing damage within a 4 tile radius without repercussions.
My ideal fix was to have the explosions effect the user aswell, so they would be less wreckless with their shots, but the staff team didn't like that so we went with disabling it.
Same reason the p4 is now disabled :p, people were getting easy wins without being put in danger. I only read the title to this thread and made it happen ; Ive personally experienced being lamed by the p4 in lms and thought it was fixed.