LOL...maybe, Jason.
Ive received posters that were inserted into a collapsed USPS box..the ones that, when assembled, measure about 15x10x2" high. Those can work fine, as there is a broad surface area on both top and bottom, to protect a (folded) poster that is slid inside (again, the box is left un-assembled and used flat).
As a follow up to that parcel story above. Once i sent the pics and described that the poster had suffered an additional gentle fold line along one edge of the poster, not 5 minutes later, i received a Paypal notice for a full refund- poster and shipping included. And I had not written to the seller, asking for even a partial refund, at that point, and wasn't decided if i would, at all.
Needless to say, I was blown away by this gesture. Even when I emailed him back, saying i wanted to pay something, he said that it was totally his fault that the poster had not been properly packaged and had gotten creased (he used the word "damaged"). And insisted for me not to send him a dime. I even asked, as a last follow up, what he would do, were I to send him a Paypal back. He said he would refuse it.
So -- there are some sellers out there, that certainly do go WAY above and beyond "the call of duty."