What Crowdfunded Project Has Screwed You Over the Hardest?

Crowdfunding isn't the same as preordering. It's a gamble at best. And with the Keryos Meteor coming out as one of the biggest crowdfunding fails in recent memory, we got to thinking: What other crowdfunding disasters have managed to slip under the radar?

What projects have you backed that just didn't follow through, either because the end product wasn't what you were promised, or is just showing no signs of ever showing up? This is a safe space. Let it all out.