I'm all for being skeptical and I thing there's some weird stuff going on, but it's always worth it to look at both sides of the story.
Loose Change vs. Popular Mechanics, Part 1
It's about a 5-part series, but it's a debate between the editors of Popular Mechanics and the kids who made Loose Change.
The kids who did Loose Change, while they have some interesting ideas, really presenting themselves poorly. They look like a bunch of young douchebags arguing with professionals when they snort and snicker and huff and puff and refer to it as "yellow journalism" or whatever.
Weird stuff going on and interesting nontheless - I'm not sure who I believe.