The last item I bought coming in that way was the iGriffin USB-Mic adapter.
The thing with those are the fact that they're close to impossible to open.
You buy something, comes home and excited want to start using it. In some kind of masocistic optimism, you imagine you're gonna be able to open the encasing with your bare hands. Desperately search for some way to open it, and there's no single way.
Scissors, Knife.. dynamite.. ???
You might try with a knife first, and find out that the most you're able to do is to put a hole in the plastic, but not much else..
Scissors work (Even if that mean you'll cut that cardboard with instructions and specs in two), but even using scissors make it easy to get the attractive item out of the packaging.
Forget all about buying something when you're on town, and expecting to use those memory cards, batteries or whatever, right away (in case you, say, have run out of memory card for your camera and buy an additional card to continue photographing), because there's no way you're gonna be able to open it until you get home anyway, unless you decide to go buy a Swiss Army Knife or something, as well.
To avoid shop-lifting? I guess that would only work because they think the shop lifters know how hard it is to get the thing out, but what's stopping them from lifting a pair of scissors as well?
It's not exactly something that make you feel good about the company making the ite.
*Mosquitos and that kind of packaging are the only exception to my anti-violence idea..