The Library

Because I'm cheap - as well as a curmudgeon - I get all my books from the library these days - no more buying the damn things. 

Boy are library book readers a bunch of slobs. You would expect they'd be erudite, ever so proper sorts (such as myself) but they border on criminal: they eat all manner of crap while reading and don't do an especially good job of cleaning up after themselves (i.e., they just turn the page and the mess goes away). 

Then you're innocently turning another page and apparently there's a very funny moment in the book on it, because some earlier reader, mouth full of god-knows-what burst out laughing and spewed. 

Finally, and most egregiously, they DOGEAR the pages. This is unforgivable in book circles. Only the basest sorts resort to dog earring pages rather than using a bookmark. Sheesh. It's like they never read a book before. 

Certainly not one about etiquette.