And where exactly is that from? It's not much anything without knowing who said it, except that I guess you like the sound of it.
Sorry. That was from TVtropes, which puts Family Guy under Seasonal Rot, just like I suspected.
Even South Park (With it's almost satirical takes on things), Futurama, and Simpsons managed to say relatively neutral in comparison to some of the newer Family Guy episodes.
Futurama yes, Simpsons yes. South Park I have a hard time believing. It's always had a very strong, heavy handed libertarian message to it. I can only think of a few episodes that didn't revolve around some libertarian moral or another. I mean, it's still a show I watch when I get the chance, I just have to have an anti-troll filter up to avoid getting pissed off at some it. The same sort of mental state you need to avoid exploding with RAEG when looking at anything on, say, 4chan.
SouthPark is neutral to me because of the extreme satire they usually do, as the show's first priority is to offend everyone. I actually think you could see any slant you like to South Park, depending on the episodes you watch. There's "SouthPark is Libertarian" articles google has found me, but reading around more I find that those omit the episodes and episode details that weren't libertarian and focus on the ones that were. Some of the episodes do have a slant, but it's not consistent between episodes. Surprisingly deep satire juxtaposed to the extremely crude nature, some of the South Park episodes I consider nearly art.
Family Guy has Brian, the self insert and completely reasonable guy, flat out state political or religious opinion X. No joke to it.Family Guy uses more of a slanted mockery. Like "Dur hurr, in the universe where X never happened, the world is so perfect even Meg is hot." It's boiled down to the point where they can simply state "opinion X" with hardly any joke to it at all beyond them connecting a particular group of viewers with similar opinions. If only one interest group finds it funny, it's going to polarize viewers about the show, which I think it has.
On the other hand, Futurama, I recall reading about their gag approval process. They literally had a hiring process by profession, IE they tried to get a mathematician, a physicist, etc. Their jokes must be approved by everyone else on the team as funny. Ends up with a wide spectrum of humor where an individual gag can be funny on different levels and viewpoints, and I think they did a fair job of shooting down offensive material.