QC: For example, maybe people like this one, working with a goal in mind but with no progress at all to begin with should be limited to say 20% past the initial funding goal. People who have a project built but need funding to finalize and release what they have, perhaps get 100% past their initial limit, established companies and businesses get 150%, increase the limit for every subsequent successful funding if they return to Kickstarter. It limits the damage from over-funding and keeps projects a bit more down to earth.
I would imagine that the only thing that would happen if they implemented this would be as they reached the limit, they would switch to receiving more pledges through Kickstarter-external means (paypal, their own site etc.). Similar to what they do when people miss the kickstarter (or want to change their pledge level afterwards).
My mind goes to some sort of system where the funds are not released in one fell swoop as soon as the goal is reached, but rather released in chunks to progress to the next stage of the project. I can't think of a fully workable system that would achieve this though.
This would mean that they would have to declare these stages and the associated cost to reach it (and people can be leery of them if they don't or they aren't realistic). If they don't deliver? People have the chance to withdraw and kickstarter can pull the plug and refund the money from the unused chunks.
Perhaps when people pledge, they could do so against a specific stage of the project that is the "minimum" they need to see to be confident enough to actually send their money (it would still be taken and held by kickstarter when the pledging finishes though). Then the kickstarter would fail if it either didn't meet its total or one of the stages is underfunded (doesn't have enough specific pledges or cannot be funded by the excess from previous stages).
Hope that made some sense because I didn't get much sleep last night...