After all, the real goal is giving people a better, more relevant experience, detecting and removing spam is just one facet of that. Whether it's email or search.
However I don't think it's as simple as changing the button text. Even a process driven UI, like a wizard style interface where you have to click next to progress through each step might work, but users very quickly become immune to dialogs. They don't read them, they just evolve the actions that get them to their goal the fastest, and the users goal does not include reporting their spam.
She's been applying it ever since quite efficiently.
Shift+e for "report spam" would be perfect. Same key, just a bit chorded.