First off, it's good to see that the situation with Hermione actually ended up strengthening his relationship with Daphne; the fact that Hannah and Hermione both went out of their way to counsel Daphne was undoubtedly a factor as that kind of loyalty says a lot about Harry.
Be afraid, Ron, be very afraid. With Hermione and Daphne combining talents for revenge on you, it's going to be uniquely nasty, even if it's not a health hazard. And that's not going to take into account Ginny's reaction now that she can't keep Hermione's support from Harry and Harry's actions toward Hermione clearly indicate that losing Ron's support is not going to pain Harry, now, as it would've earlier.
The whole bit with faking out the Weasley females was nicely done, including setting up Rita most beautifully. I can just see Harry explaining, after some "aggrieved party" complains to the Headmaster: "I'm sorry, Headmaster, I've no idea why Rita would write that; you'd think she'd heard a rumor and ran with it. Certainly, if she'd bothered to do a standard check with the Goblins, she'd have known better. On the other hand, this is perfectly in accordance with the journalistic skills and integrity she's shown in her brevious dealinsg with me." He could say it with an honest, straight face since he's got no idea, at least at first, of what really happened. Along the same lines, I wodner if Molly's or Ginny's badgering him about it would move him t try and obtain answers.