Can crashed cars win an Indy car race?

I re-watched the end of this year's 500 and again noted that several cars drove through JR's debris before the yellow lights came on. My questions:...

Source: http://www.motorsportforums.com/indycar/145815-can-crashed-cars-win-indy-car-race.html

Mitsuo Akamatsu Takashi Akita Kousuke Akiyoshi Raffaele Alberti Josef Albisser