I've seen signs of both teleporting bots .. and I've actually watched one miner standing in one spot, hacking away at the four mining nodes in the area, which is a completely different hack : rather than teleporting around, it was apparently just making stuff targetable and usable from any distance. I remember that one class in particular in Everquest was using such a hack to defeat enemies and loot their corpses from the zone in, in that game, years ago.