Yes, PayPal sucks, but you can run into this crap with any bank or payment service provider you don't have clear and direct business dealings with, and who you haven't informed upfront about what you're up to.
Also, it's just plain lazy and irresponsible of IndieGogo to pay out via PayPal, at least not without big fat warning signs. Of all the options available, this is pretty much the worst.
It's very naive to think that you can just accept money in exchange for unverifiable promises and not set off all kinds of alarm bells. Expect frozen assets to start to happen more and more often with crowdfunding, and not just at PayPal.