I noted she shows kind of a "passive resistance"- When she doesn't like a question, she answers it, without really answering it- to show her annoyance. She would do better to just say, that's a stupid question.
For instance, I saw that in the Couric interview about newspapers. Instead of just saying, "you're interviewing me here on location in the middle of a campaign rally, and the most pressing question you can ask is what newspaper I read"---the Governor showed her displeasure by dancing around the answer. To your point, Reagan likely would have just flipped it off: "Oh, Superman comics".
I saw it again with Larry King, when he asked her if she had gotten upset when Bristol first told her about the pregnancy. She danced around that answer. But, then when he came back and said, "No. Were you upset?" She channeled her anger properly, "Come'on, Larry. What do you think?!"
Exactly! That would of been the perfect response!
The 'oh' and 'well' before his light hearted response just had to make you laugh.