I think some of this is just how one processes notable events at different ages. I have similar childhood memories, which might be tainted by subsequent coverage, of the John Lennon murder and the Ronald Reagan assassination attempt. But I also have similarly vague memories of the hospital where we went to see my grandfather after a stroke when I was <5 years old. There was later family discussion but no visual records to give seed my impressionistic memory of the street and entrance to the hospital.
I was slightly older and have unambiguous memories of Mt. Saint Helens erupting, the Iran Contra hearings, etc. My fourth grade class submitted our teacher's name as a candidate for the Challenger mission, and I was in
middle school when that mission disaster occurred. I was in high school when the Berlin Wall came down, and also high school for the first Gulf War, which was my first taste of endless, wall-to-wall TV coverage. I was waking up for work on the west coast when the 9/11 news came. The post-9/11 coverage was a weird echo of the Challenger disaster coverage (endless replay of explosion and crowd response) and the Gulf War coverage. And, I was just the right age to form a very cynical and jaded attitude towards all this, seeing it as a formulaic media orgy.
Similar to the Fark thread, the breaking news was also followed on other news aggregator and discussion sites like Slashdot. I don't really think the chatter and flood of links to articles or reference to real-time TV broadcasts was that much different than what people do with Twitter and other social media today. Aside from obviously having simpler text and images and less online video content, the difference was only in the percentage of the world population using the tools.