Get it? You're supposed to think at first that it's saying polyamory is morally wrong, but really it's just saying it's wrong to mix Latin and Greek roots! Get it?
Except that...err, it's totally okay to mix Latin and Greek roots. We do it all the time. In fact, even purely Latin words might have mixed roots, because the Romans had their grubby paws all over the place, and mixed words from different languages with gleeful abandon. Latin itself is about as pure as a Baptist in a tavern, and as it says in Job 14:4, "Who can bring what is pure from the impure? No one!"
But I'm not one to stand in the way of a good linguistic joke, so I most humbly propose the following additions to the canon:
I'm writing one blog post for every contribution to our crowdfunding we receive between now and the end of the campaign. Help support indie publishing! We're publishing five new books on polyamory in 2015.