I do quite a bit of this myself. I have lots of swap flies. The ones that aren't saved, displayed or put in my fly box directly get kept in a cardboard box. I give flies away from the box to most of the new flyfishermen that I work with. I personally feel that it has a bigger impact on the individuals if it comes from a specific person and not an organization. More of that building community stuff, I guess. And I'd like to think that they will have a better chance of helping someone out later themselves.
Better to be an active environmentalist than and environmental activist.
FFMIRSWTNBOF (Full Fledged Member in Raunchy Standing-Within The NBOF)