People
We call them twinkies. You’ve seen them on television acting the news, modeling and fracturing the news while you wonder whether they’ve read the news — or if they’ve blown dried their brains, too.
— Linda Ellerbee

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This is a scathing jab at glossy presenters. The speaker nicknames them twinkies, then plays with words: they act the news, model it, fracture it. The closing gag asks whether they read what they deliver, or whether their brains got styled like their hair.
Context reviewed