What about barefoot?

These days product packaging includes plenty of warnings. Some are to protect the user. This includes the warning on a children's Batman costume, "PARENT: Please exercise caution -- FOR PLAY ONLY: Mask and chest plate are not protective: cape does not enable user to fly." (Source: http://www.nytimes.com/1997/03/05/business/warning-maybe-too-much-of-a-good-thing.html)

Other warnings are there to protect the product from damage in transit through mis-handling.

Transportation warnings on side of appliance packaging

Now these warning make sense, but many of them would only be understandable by someone who had experience working in a warehouse. The next one is a bit puzzling.

Transportation warning on top of appliance packaging

This was on the top of the box. I assume it means don't stand on the top of the box, but my pedantic side says that it is only a warning about standing on the top of the box with shoes on. What about standing on the box while barefoot?

Yes, I know that I'm being a bit ridiculous, but in the US someone will complain to the manufacturer after damaging the appliance and their defense will be, "But I took my shoes off!".