It's "nokill", not "nokills". As for grenades: primed, impact, or friendly fire (ffire or grenadeffire) grenades will always kill the thrower. They also always kill in deathmatch mode. Grenades were actually supposed to always kill the thrower, but due to a bug, they didn't for a long time. When I fixed it, some people whined and cried about it, so I made the old style timed grenades not kill the thrower.