I don't mean this as a personal attack, but it's just that this topic kind of strikes a chord with me. When I say "you" in this post I mean it figuratively.
I'm just a person who is turned off by people in stores or food courts who blindly stumble over themselves and get all grabby when a free sample presents itself, like they've never tasted seasoned chicken before or something.

I feel the same holds true in these kinds of situations. Just use tact, moderation and common sense. Do you really need to take 3, or 5, of something just because it's free? If you happen to be hungry when you're walking by, grab something. If you think a granola bar or banana might come in handy later or in the morning, take one with you.

But don't fill your bag for all snacks or meals of the day. That's not the intention and is a way I feel people rudely take advantage of situations where honor or consideration should be used. There's no need to empty a tray of food just because it's there and a CM isn't watching you. I guess the whole reason you see the free food only in the concierge level is because for people staying in the most expensive hotel accomodation that this would not be a problem.