TIL that coreutils has a lightweight version of the `finger` command, appropriately named `pinky`!
It's always depressing looking at the SSH logs for my tiny server. I have it appropriately locked down, but it's a sobering reminder of how hostile the internet can be.
Slashdot is the only community site I've seen where you can vote comments along multiple axes (insightful, interesting, funny).
It's really useful metadata: jokes are inevitable, so rather than having rules about them, let the site order comments appropriately.