Had a great (terrible) Tumblr feature idea:
You can go onto someone's blog and sue them for psychic damages, defamation, or "other." You must specify a certain amount. Then either the other blog just accepts the settlement to avoid the hassle, or you both make your arguments and who wins is decided by a jury of your peers (randomly selected other tumblr users who vote on the results).
Now, you can't sue for real money on instant sue. You can sue for notes, followers, asks, or drafts. If you sue for notes, the specified amount of notes will transfer from a random selection of their posts to a random selection of yours. If you sue in followers, a random selection of the specified number of followers will stop following them and follow you (this is an automated process, so it does not require their participation). If you sue in asks, for the specified number of days, all asks sent to them will be sent to you instead. If you sue in drafts. All of their drafts are published on your blog under your username. You cannot specify amount or which ones for drafts.
But be warned! If you lose, they get whatever you were suing for instead.