Brad shares his experience about the worst cold sales email intros, highlighting eight common ineffective approaches. These include asking if the recipient received a previous email, following up without addressing previous rejections, and generic compliments. Brad suggests that these tactics are often seen as spam and ineffective. Instead, they should propose more respectful and targeted strategies, such as offering help for future needs, being specific about the target audience, and acknowledging that the timing might not be right. Brad wants to emphasize the importance of authenticity and relevance in cold outreach.