The better ones could be added to an extension I was thinking of for the newsreader I still need to write. Basically it would take your karma on HN, and then pick a random (important) event that happened on the year that your karma currently corresponds to. (Years would be common era.)

I was thinking after the current year I could start using stuff like that one XKCD comic that predicts the future based on stupid stuff people google search for.[0]

[0]: https://xkcd.com/887/

EDIT: Oh yeah, I forgot to say what it did with the event. It just displays it somewhere on screen, like in the top corner or something.