I remember someone once told me they snapped off some usually discarded part of a vegetable in the supermarket and only put the part they would be eating in the bag to pay for. I was scandalized. That was a long time ago and I've since realized many of us have things we do that we know we shouldn't and we really don't care.
So here's mine:
I put any damn thing I like in my recycle bins and cover the top with newspaper.