This sort of thing happens on every online RPG. People stand in a corner while having text based "love". They are just doing it online because people would run away from them if they saw them in real life. Either that, or they just want attention. They know that you will pay attention to their strange name, and jailing them for nudity just gives them it. The best way to get around it is ignore them.
Or, if you really want, make a censor for AoT. Maybe a toggle switch, since people are going to code around it anyway. Good to toggle on when your parents are looking. Automatically erases chat log too. Just press Ctrl+J.