This was also a common technique used in Runescape back in the day. Takes me back. The much more innocent version was all chatting "Press alt q q for free gold" in Warcraft 3. Alt+q+q was the keyboard shortcut to abandon the match, which I learned the hard way.
Bearing in mind 10,000 [0], for anyone who's confused, hunter2 is a reference to an irc conversation submitted to bash.org back in 2004ish, the definitive "paste your password" thing.
EDIT: DO NOT TRY WHAT FOLLOWS IT IS AN EXAMPLE OF A SCAM.
Wow! XYZ is smart enough to block your password so others can't see it! ╍⡵ⱇ⪞‾╴⧊↧Ⓗ⥔⋾⁅
I can see it, but you can't. Try it!!!!
An unbelievable number of people fell for this on Myspace and Facebook in the early days.