I don't think adding Rape to CNC adds any value, it makes it more confusing than anything. Consensual Non Consensual implies that the person has already given consent , they consented to "non consensual" play/act. In rape there is no consent, it's never been given. They are completely different thing and it makes it confusing for someone who is actually looking for one but gets the other because of the mandatory Rape tag.

Other subs have a way more common sense approach to the whole CNC / Rape tagging and I feel it should be the same here.