This is a super easy way to avoid keyloggers
1. Change your password to something really difficult like 81M3a34am1
2. Copy and paste that password into a text file.... NEVER DELETE IT
3.Set your account name to show up automatically, and for the password, go into your text file, copy it, and paste it into the P/W box (use ctrl c and ctrl v for copy/paste)
This way if u get keylogged, all they will see is ctrl c and ctrl v instead of your password.
There u go, no more people stealing your P/W, I didnt know where to put this, but I guess its an exploit because your doing something just as good as a paid blizz product (I think)