It took me a while, but I finally came to the realization, after years of giving gifts to my DH's family, that once you give something to someone, you must let it go. They may or may not do what you think they should or should not do with it, but it's theirs now and you simply must let it go.
I have much more peace of mind as a result. And it makes me "think" before I "give". Not a bad thing, really!