"Mom/dad, can I please please please have Minecraft? All my friends have it and it's only $15 and blah blah blah"
Depending on the household, what follows is probably either loads more whining, the parent arranging some kind of deal involving chores and vegetables, or the parent acting as a broker ("give me $15 and I'll use my credit card"). In the end, the kid ends up with their copy of Minecraft, and promptly begins either building things or setting other peoples' things on fire.
Imagine that scenario, but instead, the kid believes they are preordering a game that their heroes are making. Perhaps if they are a bit older but still naive, they understand that the game does not yet exist, but they cannot fathom the possibility that their heroes will not follow through. I can easily see that scenario playing out almost the same: "Mom/dad, can I please please please have the Yogscast game? All my friends are ordering it and it's only $15 and it's going to be amazing and blah blah blah..." The parent probably won't read far enough into it to understand that it's a Kickstarter for something that doesn't exist yet, and will do whatever they usually do in these situations.
Sure, I can see that. The parental filter comes into play there, I don't really think that unfiltered expectations of childhood should affect Kickstarter any more than any other geek excited about a new gadget that may not materialize.
There are disappointments for kids of all ages on Kickstarter :)
