Bots and gold sellers would replace those that were afk. It would accomplish nothing. I'm not saying there should be one in place, but putting an AFK timeout would not fix much right now.

If x player gets kicked offline for being afk, one more person would fill that spot that plays. not being hostile and I'm not disagreeing, but there are far more problems right now than someone afking because they got fed up with trying to get in for hours on end.