Spiritually speaking, is it a sin to buy knockoff products?

I bought a knockoff Lifeproof case for my iPhone 5, and judging by the guilt and graphic photos on the Lifeproof website on the subject, you'd think my phone was going to burst into flames of hellfire proportions just for daring to put the thing in the thing. So is putting my thing in the thing a sin?

Added (1). Too, I should say. I'm dealing with two potential sins. I'm also a Mormon, so if it's a sin in your religion, please be more specific.

Added (2). I don't understand how it's theft. It's not like anyone stole anything. It's just making something that looks kind of the same. By that logic, Hanes and Fruit of the Loom are stealing from each other, because really, how proprietary are tighty whities?

Also, no one has addressed my thing in thing compound problem…

Added (3). Well, I did review the box. It doesn't call itself lifeproof, just waterproof, dirt proof, fire proof… Hey! I guess it's safe from hellfire after all. But seriously, this is more like walmart brand chocolate sandwich cookies vs.oreos.

what is potentially problematic is that it calls itself a "redpepper neu" and lifeproof calls itself a lifeproof neu too… Hmm…

On the other side in the winter you get a free source of heat

Yes. Never buy knockoff coach purses either. Your soul will be tormented forever in hell, burning in flames. Better to waste $200 on the real thing.

Yes it's a sin. You are contributing to a business that you know is very dishonest.

Now that we know the truth, it is patriotic to buy knockoffs.

I don't think god knew what a knock off Gucci bag is.

Did you have to knock off someone to get your cheap knock off?

I hate that. The thing about it is, they post ads about buying knockoffs and that it would cost American jobs. This is true, but the only Americans that will be affected are those who distribute those items which are actually manufactured in China.

Knock-offs are a form of theft, and theft is a both a sin and a crime. You can probably figure it out from there.

Additional Details

It's theft because the maker of the knock-off is "stealing" the name/logo, and therefore also the reputation, of the owner/creator of the product and calling it their own. They therefore benefit from a reputation that they did not earn of their own merit.So, yes, the person who buys a knock-off is not stealing, but s/he buying something stolen. And since it's cheaper, they are also benefiting from illegal activity.

So, to use your underwear example. If I have some cheap tighty whities made somewhere, and put a Hanes label on them, I'm stealing from Hanes. Now if this knock-off you bought simply looks like a Lifeproof case without claiming to be such, you're probably okay.

As for your "thing in the thing compound problem," things only burst into flame when they either inherently flammable, or are made to be so.

Straight to hell with you missy!