Well, there is a sticky thread about it. There are tons of old threads about it. Sts has said its against the rules but they aren't going to do anything about it unless it's seriously abused or they randomly want to. Like when people where boosting for guild rank. Most of the people with the ap dummy farmed the kills. So, yes it's a risk of some kind but in general people get away with it. Until sts changes their mind.