At this point, Firstborn informs me that he isn't actually typing in a name. Instead, he's creating a sign. More specifically, he's creating the inscription for a gravestone for his dead dog.
He finishes this explanation about the time he finishes typing, so I look... and sure enough, his Minecraft guy is standing in front of a gravestone... and the gravestone says:
This is not creepy at all, except for the part where OH MY GOD WHAT ARE YOU DOING, CHILD, ARE YOU ACTUALLY PUTTING FLOWERS ON THE GRAVE YOU JUST CREATED AND WHAT THE HELL IS THIS?????
I have no idea. I think I'm just going to nod my head and back away slowly from this one.