[water-data-dude]

I was never rabid about it, but I thought prediction markets were a cool idea for a while. I didn't anticipate all of the crazy second order effects.

[totallyhuman]

Same here. I soured on it a bit when I noticed them becoming a bit of a rhetorical stick, "well if you think you're right, go place a bet!". I guess that's good if you want people to only make claims they seriously believe in, but it had a tendency to shut down discussion, and I feel like there's something valuable in being able to discuss and debate without the expectation that being right should be rewarded with money, and being wrong should be punished with same.

The negative second-order effects I expected were more about people concealing information and analysis that they otherwise would have shared, replacing complex but informative discussions with a black-box oracle. Boy was I wrong.