Not really. I flip through it really quick to make sure it's not in Spanish and doesn't have a million words on a page, but that's about it. Since my kids can't read and I'm the only one who reads to them, I can "edit" something out while reading and then hide the book if I come across something I don't approve of.
Same here, except I wouldn't mind books in spanish. ODD is still too young to read, so I edit if needed.