Yep, I asked people to do the same recently at a party. They were entirely shocked. It's like realizing that your disposable cutlery and plates are actually waste and seeing it going into the actual trash makes them realize how wasteful it is. Recycle (or charity giving of clothes) is such a "guilt free" behaviour, feeling like you do something good for no efforts, so I'm not surprised people would do it even when it makes no sense.