i came across this site, Where it can apparently tell you who has "Blocked" or "deleted" You. As i went down the page it had 2 info Boxes, saying...
"e-mail: (We don't store your user information)
password: (We don't store your pass)
lol get real, Im sure no one is silly enough to fall for it. But made me giggle. Here is the site so you know to avoid. http://www.checkmessenger2.net/en/z/check-messenger/