i'm 16 right now and i'm growing up in the world that is today. now this was triggered by the family guy thread, i'll aknowledge that. there are much worse things that your children can fall to than family guy. idsnowdog brought up an excellent point. pr0n, drugs and sex will ruin a guys life way faster than watching immoral tv shows.
quite frankly most teenagers will experience drugs, sex, and (definitely) porn by the time they are out of highschool. i was the epitome of a good kid when i was in middle school. however, by going into my junior of high shcool, i've experienced all of the above as are most of the people around me.
you can't protect them from it, unless you home school...that's just looking for failure tho. what's the issue: schools. you learn a lot more than just math and history there. i knew what jacking off was in 2nd grade. did i do it at the time, of course not. my point is that the school is the fountain of "immoral things".
don't try and choke your kids from social contact, when you take something away, they will want it more. and they will find it, easily.
keep in mind that i don't live in metropolis, i live in a town of 100K
let your kids go out, but don't give a leashless time and don't choke em to death.