I just watched the video, it was .... interesting, stupid, but interesting. Personally, I think it was dumb and a waste of money.
They were being watched by security while they were in the store when they smashed it and at the end when they where in the parking lot, the security guards gave them a trespress notice and now they're ban from the mall for one year - why? They bought the item, so legally it's their property to do with as they please, so if they wanted to destroy it, that's their right. It's the same thing as buying food and then tossing it in the garbage, or buying a shirt and cutting it up with a pair of scissors and then throwing it in the garbage. The Security guards had no right to ban them from the mall.