On the flip side, I let them read whatever they want, including things that are upsetting or that other parents would say aren't appropriate, and I talk to them about what they've read.
Overall, I think these policies have meant more thoughtful media consumption, and more time outside and with friends. I'm not enough of a fool to think our rules are enforced at friends' houses, but we've chosen to live in a community that's largely on the same page.
None of this stuff is easy, but as a parent, it's the job.