As an expert SEO copywriter, I can tell you that adding people to your email list without their consent is not only unethical, but it's also illegal. In fact, it's a violation of the CAN-SPAM Act, which is a law that regulates commercial email messages. The act requires that you obtain the recipient's consent before sending them any promotional emails. This means that you can't just add someone to your email list without their permission. Doing so can result in hefty fines and damage to your brand's reputation. Instead, focus on building your email list organically by offering valuable content and incentives to your audience. By doing so, you'll not only stay within the law, but you'll also build a loyal and engaged audience that's more likely to convert into customers.