In Michael Lewis's book "Liar's Poker," he expresses a strong opinion about telemarketing, stating that one of the most detrimental actions a person can take with a phone is to reach out to strangers to sell them unwanted products. This perspective highlights the intrusive nature of such calls and the discomfort they create for recipients who are unprepared for unsolicited pitches.

This quote underscores a broader sentiment towards sales tactics that rely on cold calling, which can be seen as disrespectful of personal boundaries. Lewis's viewpoint invites reflection on the ethics of selling practices and the negative impact they can have on both the caller and the recipient.