While I’d known about this source for a long time I had the time to do more exploration and thus find the RationalWiki an excellent source. While it is heavily oriented toward debunking religion it also deals with other areas of stupidity, such as the anti-vaxxers and anti-GMO and climate change/evolution deniers. Obviously since most stupidity is on the right it tends to be leftist, but it is also willing to bring down leftie myths as well. Just take a look at a few pages exposed by the random page link to get a good sample.
And I’ll add my voice to the many people who are denouncing the psychology experiment Facebook foisted on its users without their permission or consent. Here is an outspoken denunciation of this experiment. Facebook is a truly evil entity that reflects the fundamental dishonesty of its founder, the great and all-powerful Zuck who has never turned down the opportunity to screw someone. I wonder how long it will take its users to realize they’re just the raw material in Zuck’s fortune building.