Well, I've never did that so far in my "not small amount of" time played, though it's funny you instantly call it griefing and send me to the deepest circle of hell.

The question was about the fact it can be done or not.

FYI Killing an NPC is not griefing unless you do it several times making others unable to use the NPC for it's intended purpose. According to this, rep. farming in BB would be griefing, though it is not.

Also, since it's the most inefficient way of gathering honor/kills to kill ppl outside of bgs, I really don't get the point why anyone with the slightest amount of brain would do that.

Yet, ppl keep doing that.