i also made a specific part addressing broader impacts in my research proposal, mostly focusing on how my research animal (sawflies) are charasmatic animals that could be used well in a classroom to teach aspects of natural selection...yadda yadda. I have a background in education (change of career kind of thing in the middle of college), so I focused a lot on bringing undergraduates (from all walks of life) into my lab, going to classrooms, etc.
As for the bold/italicized thing, I agree that it seems a little over the top...but who knows what gives people the advantage!