I'm going to complicate the discussion a bit. Now, I would not be apt to disagree that she "whores" out her family to score political points. On the other hand, I believe it is sincere outrage. Parents love their kids to death (usually, and duh, Fiddy, no crap, right?), but there is an added sense of dedication (typically, anyways) from those parents who have a special needs child. I think half of the damn movement is made up of folks like my parents, like my former teachers, and resource providers. They do tend to get sensitive about the whole thing, and to my opinion, at times, far too much so.
Now, I have no love for Family Guy, in fact, I usually despise it (for its lack of intelligence, lack of writing quality, bad songs, annoying side references, and so forth), but there needs to be something said for being able to poke fun at one's self. Not only that, but a sort of respectful teasing of minorities by majorities. It makes us human, and it can be liberating for people with special needs. Yeah, sometimes it gets out of hand, and is done to hurt people, but not always.
Because of that, I am not the best friend of political correctness in the movement that is supposed to represent me, and people of different disabilities that I do not have and can hardly conceive what it would be like to have them.
Modesty, respect, self-humor, self-depreciation (done healthily), can do a lot for people.