Mark Morford has a few ideas although he warns that you should never REALLY throw anything at him as much as you might like to "because you could get shot or perhaps go to jail for a very long time, which, despite how you'd be hailed a hero worldwide forevermore, would just be no fun at all. Don't do it. Throwing is wrong. OK?"
I'd like to throw science books and birth control pills.
What about you?