Do what you want, but I would advise against this. I've sold on ebay, I always packaged very well. But if I found myself in a situation where someone was unhappy, I would try to make it right with them. And if, after all that, they STILL left me a negative, I would be pretty angry and probably block them, and advise other sellers to do the same. Sellers are human beings and sometimes make mistakes. I've bought from some sellers whose packaging was just throwing the poster in an envelope with some cardboard and shipping it off. If the poster were to be damaged in shipping, is that because of seller "neglect"?
I understand you feel strongly about this, but I think it's best that you save your negatives for situations that warrant them. You don't want to develop a reputation for being a pain in the neck. Or else nobody will sell to you.
