This isn't just a plane crash, this was an aircraft that was shot down while on a perfectly normal commercial flight between two major international hubs. This could have very serious, long-term global ramifications and every person who comes to HN should be aware it happened.
Already in the wayback thread on this, I've discovered a news tracking startup and an in depth discussion for people who take this exact flight and route.
This wasn't a plane passing between Baghdad and Kabul or some similar dangerous route. There's been a couple of other flying related accidents today also. This is the notable one.
If you take a plane frequently (like I expect lots of people here do), you'll probably be interested in this story and the kind of in-depth discussion that only HN can bring to bear on it.
edit Just found out the relative of a person I know was on the plane and is now dead.
"Off-Topic: Most stories about politics, or crime, or sports [...]. If they'd cover it on TV news, it's probably off-topic."
Just add "on twitter" to any off topic news item and suddenly it's on topic.