At present, which form of direct marketing is considered the most controversial?

Name: At present, which form of direct marketing is considered the most controversial?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Bulk email, or spam, is considered the most controversial form of direct marketing due to its invasive nature and potential to cause harm (such as spreading viruses or promoting scams). It is also illegal in many countries unless the recipient has given explicit consent to receive such emails.

At Present, Which Form of Direct Marketing Is Considered the Most