It's factored into my reasoning behind starting them off at $9.99 with no reserve - the shipping costs are a protection I build into the few auctions I run (I use BINOBO almost exclusively). If my auction template had mentioned combined shipping and I would have failed to offer that convenience because the auctions ended at $9.99, then I would agree with you, but that's not what happened here. My auctions do not mention combined shipping costs. FWIW, I do combine shipping costs on BINOBO items.
Nor did I force him to accept the shipping costs associated with his purchases. And, as I understand it, threatening to leave negative feedback to produce a desired outcome is against eBay's policy.
I don't recall blaming him for anything, unless you are implying that expecting him to pay the advertised shipping prices associated with his purchases is blaming him.
Oh, nobody's saying that you didn't follow rules or that you violated some terms.
I think most people are arguing here that the idea of not refunding excess shipping for multiple items may be technically correct, but it ain't right.