Since some of you might have noticed, there is queue for some realms cause of the new expansion. You know it might be annoying to get home from school/work and notice there is 2000 ppl queue, and you miss your raid, well no more. There is a way to prevent going afk without any programs.
Take your (preferrable 90lvl) character to Ragefire Chasm.
Pull 1 dog from the beginning, make your way so he attacks you in your face
Enjoy going afk but not getting logged out cause of the combat
TLDR: Take your char to Ragefire Chasm and pull mob, you go afk but can't be logged out.