Boondocks and Family Guy definitely stand for something to balance off their cynicism. Hell, the later seasons of Family Guy sees Brian becoming a mouthpiece for Seth's politics
I'm not saying it isn't funny. It is, in fact, VERY funny. But TV shows are like people. You invite them into your homes, you have up and downs, you talk about them with friends, you hang out when a certain times once a week. And if there isn't something else to them besides just displeasure, some kind of heart or self-effecting humanism, then there's those funny people you know that you wouldn't want to hang out with.
It's a show that embraces nothing but itself. I can never call a show like that "great" or "I love that show", despite how smart and funny it often is.
edit: Also, LOL @ Ace already getting banned pre-E3.
It's satire. Satire's job isn't to put forward a detailed argument for a social or political outlook, it's job is to hold a mirror up to society and politics and show people how utterly absurd it can be. This is the way that satire has worked going right back to the political cartoons in the newspapers of the 19th century, through writers like Swift, Wilde and Shaw, and South Park, as odd as it may be to say, is a continuation of that. It's hugely variable in its quality, largely due to the pressures of making an entire episode every week, but at its best it's the best social and political satire around, far moreso than something like Family Guy.
Anyway, while that's almost completely off topic, I will say that I'm looking forward to the South Park RPG because, while you might laugh at the suggestion, I see it as the spiritual successor to Alpha Protocol. The great thing about Alpha Protocol was that, rather than being placed on a rigid good/evil axis that affects everything in the game world, your character had different relationships with the NPCs you encounter. A particular NPC might like you, another one might hate you, another one might distrust you, etc., and these all had an effect on the way the story progressed. This made it a real breath of fresh air compared to most western RPGs, but unfortunately the actual combat in the game was fairly janky, so the game tanked. With the South Park RPG, Obsidian have a perfect opportunity to have another go at the Alpha Protocol approach, as you're a new kid in South Park who has to get to know various characters from the series. There's also the Paper Mario style combat, which they can't possibly screw up, and the South Park IP (with Matt and Trey's involvement) which should ensure the game does fairly well commercially.