Then we can all build up sets of related things collaboratively. You could also take all the posts and related links, toss them in a big adjacency matrix and,

Then we can all build up sets of related things collaboratively. You could also take all the posts and related links, toss them in a big adjacency matrix and, oh I dunno, rank the relatedness of pages. Dumb jokes aside, these do add a lot of extra structure to the dataset and people might think up something interesting to do with that.