When I pledge for a crowdfunding project, I know there's a risk involved. I'm sharing the dream of the project with that entrepreneur. For that, I'm not expecting a whole finished product, warranties, and so on and so forth. If I want that experience, I don't do a pledge in a crowdfunding site, I go out and buy it on Amazon or any other site.
People shouldn't be going to Kickstarter or IndieGoGo to buy stuff. If they're doing it for that reason, they're doing it wrong. People should be going to crowdfunding sites and pledging their money, because they want to be a part or help that project. That's it!
Maybe I'm being naive and that's the whole point of crowsourcing.
Of course, other would disagree.
That being said, delivery logistics is one of the most underestimated head aches of any hardware project. I would assume that if the project becomes big, then it makes it easier to afford those logistics, then again logistics can eat out other costs.