Allright! This is the ultimate "cheat" for scaring people and stealing amounts of g and items! I really enjoy doing this cheat so you'd better check it out!
Firstly, note that you can use this cheat only at certain chat modes (Party, Guild, Whisper). Type your message that will be displayed as a message from your name. After you've typed it, press space until the primary message has dissapeared. Now you type the following :
[Party] [Deadlybow]: Hi! Give me all your gold [Party] [Trevor]: Give them now!
The one who reads it, will surely think that indeed a GM spoke to him! Have fun!
Moonwalk
Press [Jump] then while in the air press E. While you are on your way down press Q + A.