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"El Reg's use of the MLF acronym pre-dates the immensely stupid acronym "Mother I'd Like To..." book in for a spa weekend. "

Really? Because the earliest El Reg search puts your use at 2009...

And then you have: https://fas.org/irp/world/para/milf.htm

..and..although not meeting journalistic requirements for publishing, anecdotally: http://www.ign.com/boards/threads/did-the-term-milf-exist-before-american-pie-movie.47500538/

Sorry. It is a low point in the day...