Krutika Mallikarjuna received a "Collection" badge on December 1, 2012 because they posted something that people are adding to. That's harder than it sounds - usually people are just like, "meh," (which, and I get that we're now waaaaaaay off topic, is a really annoying thing to say under almost any circumstances).
Here is the post that earned this award. Why not add to it?!