I agree with you. I usually don't buy from people who don't combine shipping.
I'm more forgiving about the recycled bubble mailers. Landfills don't go away overnight. When I build up too many of the used incoming mailers, I trim them down, secure the cards in them, and then plop the bundle in a new, 6x9 manila envelope(made with recycled paper). It doesn't save time (nor much money), but I think recycling is important. I have had zero complaints, and the cards are secure. Go ahead, let the bashing begin. I can take it.