I know it's fashionable to bash Arrington on HN, but I'm willing to take the karma beating and say this: couldn't the MYB CEO have requested the FunAdvice CEO submit to a confidentiality agreement for this specific reason?
Here's another, potentially more-provoking one: Isn't this what "good business" is all about? Manipulation of your opponent? Using what you can to generate PR buzz? "I'm not being a jerk, I'm just doing good business."
Please do not treat this post as a testimony of my own values.