First, Wikipedia is, by its own admission, not a reliable source. Worse, any Wikipedia entry on a subject is always captured by an ideological group if it is recognized that the subject has implications for public policy.
The distinction between consensual and non-consensual activity of any sort is an extremely important one, and perhaps especially important when the activity is sexual. Regardless as to whether violence is involved, it would be just super if those series with non-consensual intimacy could be reliably tagged. However, while some activity is clearly consensual and some is clearly non-consensual, there is a range over which there is genuine ambiguity. And, even outside of that range, there will be some parties who perversely argue that the consensual is really non-consensual, other parties who perversely argue that the non-consensual is really consensual, and still other who are honestly mistaken.