Just don't be a expletive about it. We were behind a family of 5 at Marvel meet and great. They each had a book, a t-shirt, and a frame. 15 pieces! Captain America shut that down though and only signed the books. Also it was day 5 of the cruise and mom still didn't have a rhythm down and only one piece of cardboard for the shirts which she had to take out and put in again with each signing. I would just ask you to be aware of all the people in line behind you. Have everything out and ready. Have hard material for each t-shirt or pillow case. And please don't make a scene if the character refuses.