Guerilla marketing (I prefer that term), well I think the concept itself is awesome. That would include wheatpasting advertisements, wheatpaste and sticker campaigns, going on internet boards and chat rooms and talking about how great this "new product" is, voting in online polls to make something seem better, etc. etc. But at the same time it IS deceptive.
I remember around 95-96 when the Sony Playstation just dropped, and the Nintendo 64 was getting ready to drop. The salesmen who worked at Electronics Boutique apparently were paid off by Sony to let all the customers know that PlayStation was a far superior system in so many ways at that the N64 was garbage in comparison. Some slick shit.
By the way that Six Dollar Burger at Carl's Jr. is the shit. Greatest thing I've ever tasted.