This is the same sort of thing that plagues the greater Pagan community and Burner culture and so on. I think it's a matter of the folks being quoted not considering that the reporter is likely to home in on the most salacious comments and highlight those. Not everybody who is poly (or Pagan or a Burner or whatever) should be granting interviews for exactly this reason--yet far too many think they are fully capable of giving good interviews.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.