Non-PVP: Yalahar Golem is near dp and it's impossible for someone to kill you there. I also like to be AFK in Darashias Catacombs (where you kill Koshei the Deathless and Sir Baeloc/Sir Nictros). In the begining of the cave, there are only rats and you can go north and close the door with 1 rat. It's impossible for someone to rope you up in this place. Also, if you stay north, people will enter the cave to do their daily Grave Danger rotation and they won't see you there).
PVP: you need to be creative to be AFK. One good place is in the Desert Dungeon Quest vocation-only areas. You need to grab some keys and do some extra steps to get to those areas, so it's kind hard for people to find you there. Also, if you are of one vocation, you can have another low level of another vocation to rope you up to their vocation-only area. For example, you can have an ED to rope your RP to the ED-only area. I know that in ED's area there's a bear. I don't remember well what you get in the other areas... But you can always summon a mad sheep.