The whole 'emotional shutdown' argument makes R/Hr impossible. If Harry had reacted positively to Hermione's kiss, H/Hers would jump on it as evidence - and rightly so. Harry's Hermione's friend, he wouldn't react negatively to it. And even if we did get something like 'ew! gross!', I wouldn't be surprised if H/Hers to that as canon evidence, as well. The same is true for Hermione's hugs - if he was happy to hug Hermione, it's H/Hr shippiness. He shouldn't be negative toward Hermione's hugs - it's a hug from a good friend, there's nothing to be embarrased about (*cough*nonhughandshake*cough*). It's impossible for R/Hr to happen.

Btw, I loved your "Flight of Love" comment on the DT.