no it won't if you pick the right pillow. Maybe if you've got a nice down filled pillow it will mold around it and burn your house down. But if you use a $2 pillow from Walmart there are plenty of lumps and misshapes to add breathing holes (trust me I do it all the time). Or if you have a woman in the house you probably have a random collection of weird shaped pillows throughout the house (like on the couch or bed). Many people will know what I'm talking about. You ever stay in someone's bedroom with like 15 different pillows on the bed and you have to throw most of them on the floor just to get in bed? Some of those annoying pretty pillows would work fine.
Plus I just figured out the picture frame thing. Lots of people go through bad break ups and rip up pictures of their ex but keep the frames. Because you're crazy AND cheap. Lol