Only works when you're aren't log on Microsoft account doesn't really affect other players but when you're on omlet arcade etc. It's annoying

 (Haven't tested on other versions of Minecraft)

Also they can tellraw without commands then that player with no name will start to mess with others try to tellraw and say bad word just to make a fight.

Game mode: all

Affect versions: most.

How to reproduce

1. Go to the Minecraft file (android/data/mojang.com/files/games/Minecraftpe/option.txt).
2. Open option.txt with txt editor or other app that can change the txt of a txt.file.
3. After you're inside of the file, change the username to ex. (.........................................) Minimum 50  . Then save the file in the current folder or replace 
4. Go back to Minecraft and see the name is glitched