This is a technique to help you scam - quite possibly posted elsewhere but i though worthwile highligting here.
This will be a work in progress so I am looking for some suggestions from you expert scammers so we can use this method to come up with a new all singing and dancing scam.
If you /w someone then put spaces into your message until the last letter of your message disappears from view you can then type
[Fred] whispers: Hiya can you send the BOEs we got from Naxx raid today to the new bank character YourAlt. I will send you 300gold to spend on some new kit etc from guild funds cheers
The recipient gets a chat that looks like he just recveived a whisper from your char and another seperate whisper from Fred immediately after your chars whisper
my thoughts are this can be used for allsorts of scams
possibly impersonating a guildleader and trying to trick a member into sending items or gold to your char.
obviously downside is the recipient cant simply click [Fred] and reply to the whisper so it is detectable - but some people will certainly fall for it or dismiss it as a glitch.
You can only have one way conversation - so whatever scams we can think up need to be quick - eg u know the guildleader is offline - you use this method to send a fake message from the guild leader to your target and when he checks he finds the guild leader you are imopersonating is offline but sends you items and gold to the character the fake guild leader requested.