About harvesting personal information
Harvesting information at scale, also known as scraping, through the use of an automated tool for any unpermitted purpose violates the WhatsApp Terms of Service. Scrapers may attempt to search for and save users' information including phone numbers, user profile pictures, and statuses from the WhatsApp platform.
Some accounts might be temporarily or permanently banned if suspected of scraping personal information from the WhatsApp app. For more information on how to use WhatsApp responsibly, read this article.