I think it all boils down to convenience, and how Disney Parks (and theme parks in general) are different from supermarkets and other large stores. Likewise, there's also the question about balancing convenience and conservation, particularly in the current enviropolitical climate where we're grappling with the need to mitigate destructive waste and how our recycling systems badly need improvement, not to mention how science needs to come up with what I term the 'Goldilocks solution', where there's a truly environmentally-friendly solution that would please both sides.