I will try to give this advice in the gentlest way possible both because it isn't a big deal, and to avoid a thread-destroying argument: Might I suggest you adopt a different phrase (which I see you've used a few times just in this conversation) other than "thanks man"? I'm not offended by it, and most other people probably wouldn't be either, but it does strike me as making the unfortunate assumption that everyone on this forum is a man. (I know that many people who use the word "man" in this way don't really mean to be referring to literal males. I'm one of them, in fact. I have been known to call my wife 'man.' But the impression will remain, for some--especially among people who don't know you.)

I'm sure you don't mean to offend, and you're just trying to be friendly and appreciative--and I would not blame you for bristling a bit at an off-topic scolding by the PC police. But it would cost you nothing to just say "thanks," and it could save you some grief in the future.

Just a thought from a friend.

Edit - I should have said this first: the service seems really cool. I'll try it next time I travel.