I suspect ours will get there eventually, but at the moment they're still dazzled enough at having an actual industrial space to work in that when we go "hey, we'e going to take this stuff to recycle at the dump, but we thought we'd ask if you wanted it first" half the time they still say, "ooh, yeah, we want that!"

And hey, giving them the stuff they ask for is probably the best way to teach them to show more discrimination. :P