Honestly, I'm torn about this. On one hand, I don't really use automation, but I don't have a big issue with it normally since easy to get drops were devalued. Sure if someone wants to make 50 chars to do daily quests with bat wings, they can make a lot of money, but talk about having no life. As long as the rules specify afk botting as the problem, I have nothing bad to say about using it while at the keyboard.
What I do have a problem with, is abusing stacking. Honestly, at first I thought the Follow feature in some clients was funny. But when you're a huge stack using follow-attack,it not only slows down things a bit for some, it's also annoying when the automated stack leader comes and destroys the monster you've been working on, kills it and takes the drop within seconds.
I'll be clear though, there are some that fight in stacks that are respectful, and I don't really have a problem with any of you. In fact, to me the biggest annoyance are the players with 3-5 alts of themselves, that just stack-level all day.
So, for stackers who try to avoid stealing kills/drops, and have respect, we're all good. But the ones who don't, watch out, I'm gonna make life suck everytime I see you. And, a side note, next time a stack member casts rain anywhere in my proximity while I'm maging in the graveyard, I will END YOU and those you hold dear continuously until the one responsible apologizes. Not being hateful, but when people stall my gameplay with no provocation, I respond how I'm wired, and get even

.
*EDIT* Anytime ANYbody, stacker or otherwise, pulls a spiteful move like this near me, I will respond as stated above.