Yeah, make the little cockfart suffer, I say!

EDIT: confession time - I squirm uncomfortably in the latest movies whenever Peter makes a stupid and completely preventable mistake, and the writers make him do it over and over again, like a narrative crutch to advance the plot, to the point that I find it irritating, because Peter seems to be learning nothing along the way.
The Tobey Maguire ones did it best, I feel, kept a balance between honest mistakes of inexperience and us feeling sympathy for him.