Process Kill command is the highest level of OS command and its performed instantly without any thinking of problems after doing this.
As the command name says,the process is killed not stopped,thus there is no waiting for program/process to respond with the quit/stop command but terminating it instantly,so there is very hard to create protection for this.
It can be protected by attaching other process actively to the one we want to protect,but you can easily terminate second one and you have access to the first one again.