What is the ruling on using data scraping programs that download customer data from other Facebook pages (such as phone numbers and personal pages) with the aim of reaching potential customers in the field of clothing marketing?

Data displayed publicly has no harm in being retrieved for a purpose that does not harm its owners, because displaying it in that manner indicates permission. As for protected data, it is not permissible to retrieve it using programs to access it, due to the lack of permission for that, and this is considered an infringement on the privacy of others.