Interns are the lowest of the low, after all. They're the scapegoat in most situations, they are almost universally seen as wholly incompetent... Stepping forward to admit to the wanton destruction of the Keurig machine just proves the prejudice against them correct once again, and so it's almost guaranteed that the intern can't step forward, at this point. There's too much paralytic fear-weight keeping him or her frozen, now.