honestly, if I am happy having something away -- such that I'm willing to put it out for free -- what someone else does with it is *their* business.
I really like your daughter's observation: "Every time I buy something, I think: how will I get rid of it when we don't need it any more?"
Very intuitive, she is!
We are a "stuff-oriented" society. TV stations have even taken notice and created reality shows like Hoarders!
I took note of that as well, and it's why I started my own website/blog, specifically targeting the boomers, who have accumulated TONS of stuff throughout their lives!