You’d be amazed how many people are stupid enough to use the same password for their email as they use for random websites that require them to enter such email. Do people not realize that webmasters of any website can see all passwords entered if they want to?

In fact, it is common practice to create politically-charged discussion websites/blogs to try and catch idiots who create an account to defend their viewpoint and effectively give the webmasters the password to all their other online accounts.