Imagine this scenerio:
You construct a fake email address: "dontcare@dontknow.org"
You sign up for a web forum with that email address.
Someone actually owns dontknow.org, its a friend of mine. He can set up an email account, get your password reset, and get the new password sent to him! He gets tons of these daily.
If you're going to use fake email addresses for what ever reason, use @example.com.
That specific address was set up by the "internet dieties" for that specific purpose. That way you won't be sending possibly secret information to someone you don't know.
