I think that there are several songs that should not be played because of lyrics, at least if a station positions it self as being for the whole family.
As with a lot of things, society isn't shocked by much any more and we are much more tolerant of questionable lyrics. Top 40 has already gone through this. Most anything goes and I feel that Country is headed down that same road.
That said, I guess that half of the country format could be called "non-family friendly" due to content and subject matter.
With all due respects - where have you folks been for about 30 to 40 years?
1977 - #1 record - Johnny Paycheck - I'm The Only Hell (My Mama Ever Raised)
1960 - Original Version - Big Bad John - Jimmy Dean ("at the bottom of this mine lives one hell of a man...Big John.) Yes, few stations played it...but it was there.
1980's - Mac Davis..,"she's one hell of a woman".
1980's - Hank Williams, Junior - If you don't like Hank Williams, you can kiss my (you know the word).
Understand, I'm not saying that most country songs need profanities...my point is that these songs have come along from time to time for decades. Country music is about real life. So, in a sense, it can never be truly "family friendly". Because real life sometimes isn't.