I totally agree that the best way to reinforce what your story is about is by just writing what you think it's about - NOT by mentioning the stuff that you think it isn't about, and mentioning it in the text. I've seen that rather ruin stories, where a character suddenly goes OOC for a bit just so that TPTB can point out hey, that's OOC. And my response is, you'd have been better off just having them continue to act like themselves, to get that point across.