Have you ever changed your mind online?

Have you ever read anything online that made you change your mind about something? An essay, a manifesto, an argument that was so cogent, well-delivered and persuasive that you not only switched positions but also took the time to tell someone else about it?

If you did, I’d like to hear about it. Send me a link. I’m looking for the best online manifestos–sort of a top ten list of persuasion.