I'm a bad mom and don't let my kids pick books at the library to help them get interested and take ownership in reading. This is because they pick books that
a. are stupid (like those awful paperbacks based on Disney movies ever so distantly related to actual literature)
b. annoy me (LOTS of these)
c. have problematic contents (eg divorced families, disrespectful treatment of elders and siblings, political propaganda, farting dogs [WHY????])
I flip through every book we bring home to see that they're satisfactory and still, almost every time, I end up with one that I have to alter when we read it or hide altogether.
This system isn't going to last forever, though. Big Girl is about five minutes away from reading independently and I can hardly keep picking out all her books until she's safely married. How well I remember the trouble that ensued when my mom picked up a book I brought home from the library sometime in middle school and discovered that the YA section is not a kid-safe zone AT ALL. Even if it isn't Judy Blume kindly taking the trouble to shape my children's sexual ethic for me, I'm scared about what my kids will run across in books. I don't want to turn our house into a police state, and I know they'll find out eventually that other kids talk back and are mean, and much worse things. But . . . ?