Idk if it is posted or not, but here is my new exploit:
Have u ever had guild which was annoying u, and had curvy(<-typo) names with a lot of symbols and u couldnt put them on hostile list?
Here is my new tip: Just join the guild which u wanna hostile with a noob or something and donate money (1 silver

) than it will say "u donated x money to the guild" go to
Chat Log and find that row in which the [Server] announced ur donation, than
Copy the guild name and finally
Paste it to the hostile section.
I hope it helped u
Dont foget to put on "Record" in the Chat Log