In real life people do think of pieces of paper as having different levels of security or privacy. Some pieces of paper you can leave out on the coffee table, others get locked in a desk, and still others in a safety-deposit box.
Also, as separate point, your use of the word "trade-off" assumes that there is no alternative other than giving the user some complex privacy-aware UI or complicated procedures.
In real life people do think of pieces of paper as having different levels of security or privacy. Some pieces of paper you can leave out on the coffee table, others get locked in a desk, and still others in a safety-deposit box.
Also, as separate point, your use of the word "trade-off" assumes that there is no alternative other than giving the user some complex privacy-aware UI or complicated procedures.