I disagree. It is central to Peggy's professional life to think about how her clients' and their products are portrayed in the media. We have seen countless examples that demonstrate the creative staff and even account services try to pay close attention to trends. An example: when that American Airlines plane went down, instantly creatives were thinking about ads for their then-airline-client (the client they dumped for Duck's bullshit). And remember Don's comment that Lane has receipts for all the movies and shows he sees: keeping up is part of their work in advertising.
They don't just think of ads in terms of what they will look like: in order to be good creative advertising people, they have to track fast.
I was ten years old the day Kennedy got shot. My family's television actually broke that day. It took my folks a couple days to get a new set and we kids felt really left out. . . everyone was glued to televisions that whole weekend. But I caught glimpses of the assasination. . . first at school the afternoon after he was shot and then in friends' home over that weekend . . and there were photos in the newspaper, which I already read daily. There were photos of the convertible, with Kennedy and Jackie riding in it.
My single visual 'memory' of the assasination is based on my mental image of Jack and Jackie in that convertible in the moments before tragedy struck.
It makes perfect sense that someone who just 'created' an ad showing people riding in an open convertible would connect the dots. Peggy lives and breaths her work. She loves her work. She wants to rise. She cares, a whole lot. She wouldn't be good at her job if she didn't connect the dots quickly.
I think it is perfect that Peggy goes into the office that day. The world kinda stood still that day. It was boring really. There was nothing 'new' going on: just everyone frozen in collective mourning, which I guess makes some sense. But it also makes sense that some people would do something else.
And besides, Peggy knew there was a tv in the office. She knew she could watch the funeral there.