Anthony Watt has a nice catalog of past predictions of doom (e.g. running out of oil, food, climate issues, etc). It really would be funny if not such a serious and structural issue with the media. I would love to see someone like the NY Times have a sort of equivalent of their reader advocate whose job was to go through past predictions published in the paper and see how they matched up to reality. If I had more time, it is the blog I would like to start.
Update: One of his readers Dennis Wingo took the resource depletion table from Ehrlich's Limits to Growth and annotated it -- the numbers in red show the resources Ehrlich predicted we should already run out of.
However, rather than ever, ever going back and visiting these forecasting failures and trying to understand the structural problem with them, the media still runs back to Ehrlich as an "expert".