There are a multitude of level 50 black mages teleporting around the game world with (I presume) third party software—teleporting from NPC to NPC, and throughout the zones; no use of the aethernet observed. They all have randomized characters for names; most are sprouts. As there's no way for me to (reasonably) report this in-game—because for some reason or another there's no report option from the search function—I'll just post screenshots of their names here.

World: Sargatanas
Time: 4:00 PM EST