Of course we all know bloggers and journalists don't scope out FR for story links and ideas ;) It would be nice if credit was given when they do -- just like when an individual blog is given credit for an original idea. In this case most likely it was just great minds thinking alike.
I think any general tendency to pull ideas from FR without mentioning the source is due to a FR post being seen by non-members as an anonymous source of information that won't notice if someone takes an idea without credit.