Networks don't swear for artistic integrity; they do it because it draws more paying customers.

Huh? With the exception of a few preteens, who watches TV because they contain profanity? And I'm sure preteens aren't their target audience since TV networks are always wetting themselves over the "18-49" market (another concept I've never understood - at one time that market segment contained both me and my parents). Anyone who is immature enough to watch a TV show just so they can hear a few swear words won't have any say over which channels their household subscribes to. I'm sure advertisers would prefer that the shows didn't swear - at any rate, they certainly wouldn't be more inclined to sponsor a show because it contains profanity. So who out there does the letter-writer suggest is paying money for the main purpose of hearing profanity?

Shows that contain profanity might draw more paying customers because they tend to be more willing to deal with adult or subversive topics than fluffy mainstream pablum network show are, but profanity isn't what makes people watch TV shows!