I ran across a new twist on that packaging form that everyone loves to hate: the clamshell. You know, those clear packages that you can't open with scissors or a knife or probably even a machete. Unlike what the women in this picture is attempting, I do not recommend using your teeth:
As I've mentioned in the past, I don't like clamshell packaging. I do understand the rationale for it, such as improved visibility and ease of displaying the products, the other argument that is relevent here is that it also reduces thievery - since the package is so big and difficult to open, it also means that would be theives can't open the package easily in the store and slip the small valuable items out under their clothing.
So while I was installing a few new smoke detectors in the house this last weekend, I was quite both pleased and shocked to find that the clamshell packaging was pre-perforated for easiy opening. Look at this picture: