I've heard various anecdotes about people with maroon clownfish without the cheek spines. I would think a more logical conclusion would be a variant of a maroon clownfish rather than the very slight statistical probability of the extraordinarily rare cross (so rare it has been described only sporadically even in captivity).
On the whole "terminology" thing.... Whether you decide to "go by the norms" or not is up to you, but when you are posting on a forum for everyone to read it's lots easier if we all use the same terms established through time. Even though you seem to know the difference, someone less knowledgeable reads the post, then figures this is how it is. Then they go to sell a pair of "mated" clownfish that have never produced an egg, the myth is further propagated. See how it can spin poorly? Even if you don't plan on selling them, it's best to define them correctly when discussing with others. (lord knows how much arguing we've all seen from true-percs/onyx threads!)