I hear ya, man. I'm just saying that TV stations spend a lot of money analyzing exactly what time they can get the most amount of people to watch.
And trust me...leaving at 3 or 4 is just as bad out here. Rush "hour" lasts from around 2:30 until 7:30 in this town. 
Sort of related. We were appalled/proud/appalled here in Toronto to find out that our traffic is even worse than in L.A. Toronto has the worst traffic congestion on the continent.
Holy crap...really?!?! Toronto? Not that it's not a major city, but wow. I would have never guessed that.