The primary privacy consideration for not sending large-scale SPAM type emails to a database of email addresses is that these emails are unsolicited. Option B highlights this concern, as unsolicited emails can violate privacy principles and regulations such as the General Data Protection Regulation (GDPR) and CAN-SPAM Act, which require consent for marketing communications. This point is well-documented in IAPP's CIPT resources, particularly in discussions about user consent and data protection in marketing activities.