LF: Frankly, I find this thread despicable. You took the built-in assumption that some people care about Bein Adam L’Chaveiro more than Bein Adam L’Makom (and, let’s face it, we all know who “some people” are here) and therefore wanted to prove a point about their gut reactions. You wanted to show that there are disingenuous people who don’t care about Hashem and care about “being nice” more and that for some reason is a P’gam in their Yiddishkeit. It is uncalled-for and unnecessary.
Moreover, you are actually wrong. The rule by Bein Adam L’Makom is if there is no source to Assur, it’s not Assur. Hence, the gut reaction should be to ask someone who knows. On the other hand, there is a pretty famous Gemara (Shabbos 32a, quite possibly the most famous Gemara) that says that the gut reaction to Bein Adam L’Chaveiro should be to err on the side of not doing it.