No, not really, i dont think they really care.

Wouldent you rather sleep on a nice clean carpet than in the dirt or in a pile of wood chips constantly poking you ??

Plus Reptile carpet and newspaper tend to be cleaner becuase you can see the whole mess the snake leaves behind when it poos of pees and you can see the whole wet spot, not like dirt where all thats left is the little white ball and all of that other yucky bacteria is hidden and soaked up into the substrate.