My friend is getting married in another country and having her reception in the states but another state from where she lives. So, clearly, she cannot bring any sort of boxed presents back on the plane with her from either event because it would just be way too much. She's putting no boxed gifts on her invitations. I think this is an awesome idea and practical but I was wondering if there are any etiquette rules behind it. She will have a registry but if people want to purchase things off of it, they'll have to have it shipped to her home. So, what do the etiquette gods think of this?