Brian,
The other side to the 1st Amendment is the responsibility of the recipient of what is being communicated to apply filters based on their own set of knowledge, experience, intuition, culture, values, etc.
I firmly believe the vast majority of people in our culture today accept short sound bites, tweets, email blurbs, etc. as some form of truth and fail to apply sufficient filters and just let this stuff sync into the psyche where it becomes "truth".
It is understandable but not excusable that people do not maintain a stronger filter shield to avoid all the nonsense that gets blown onto the public.
As to Katie Couric specifically, she is a has been and the sinking ship of a show she is on is going under end of season and she is jumping ship to Yahoo, really? Boy, now that is a forward career step if there every was one.
To be fair, what appears to have happened is she wanted to bring harder news stories to the show but the bosses wanted softer and more variety themed stories for that time slot.
As Forest Gump so eloquently put it, "Stupid is as stupid does".