Actually, aggregation has a long, proud and ethical history in journalism. If you’re an old-school journalist, don’t think Huffington Post or Drudge when you think about aggregation; think AP. The Associated Press is primarily an aggregation service*, except that it its members pay huge fees for the privilege of being aggregated (and for receiving content aggregated from other members).
The New York Times and Washington Post also have long histories of aggregation. In my years at various Midwestern newspapers, we reported big local and regional stories that attracted the attention of the Times, Post and other national news organizations. Facts we had reported first invariably turned up in the Times and Post stories without attribution or with vague attribution such as “local media reports.” I don’t say that critically. When I was a reporter and editor at various Midwestern newspapers, we did the same thing with facts we aggregated from smaller newspapers as we did regional versions of their local stories.