Facebook attempts to bamboozle users into using at-facebook-dot-com email addresses.
The link describes how to stop displaying the at-facebook-dot-com email address, but, consistent with its practice, Facebook moved the settings around again and it took me about five minutes to find it. There is no way to make that at-facebook-dot-com email address go away, though.
Anyone who tries to email me at that address, forget it. I’ll never check it and, if I stumble over it in a drunken stupor, I’ll just delete the mails.
Thanks to Todd for reporting this.