Which is complete bullshit. If the girl is irresponsible enough to land herself in that position, then wakes up in a strangers bed the next day, that is her problem. Chalk it up as a lesson learned and move on.
I think there's a big difference between a drunken one night stand (i.e. waking up in a stranger's bed) and being violently gang raped. You really can't compare the two. For the former, you may have regrets about your behavior, but it was of your own free will. For the latter, she had no chance after being forced into a bathroom.
If I recall, the article said that they had provided her the alcohol. If this was someone who rarely if ever drank, it wouldn't take much for her to get really drunk and not know enough how quickly it would hit her.