I put this book under "dangerous knowledge." Cialdini, still a top consultant in this field, has a tiny disclaimer at the end of the book saying how he's aware that this knowledge could be misused, but doesn't go much further.

I see this stuff abused all the time, to spin democracies to go to war, to sell us products and services we don't really need and much, much more.

I've been wanting to start an ethics institute around this topic. Interested? Write me!