You can browse through 700+ other projects on the KiF page and judge for yourself whether or not it helps. I don't know that anyone has presented solid evidence of it actually hurting or helping. It might be for the best to follow the guidelines above provided by Kickstarter about leaving the badge off your project page etc. One obvious success story from a KiF project:
https://www.kickstarter.com/projects/ro ... e?ref=cardInterestingly enough, he does have the KiF badge on his project, albeit wayyyy down on the page. With a presentation that good, I'm guessing this guy would have reached his funding goal no matter what.