Maybe UPS drivers ignore it, or maybe UPS no longer does it, but it's not an urban legend: https://www.ups.com/us/en/services/knowledge-center/article.page?kid

Maybe UPS drivers ignore it, or maybe UPS no longer does it, but it's not an urban legend: https://www.ups.com/us/en/services/knowledge-center/article.page?kid=aa3710c2 https://www.ups.com/us/en/services/knowledge-center/article.... (This link claims they had 55,000 drivers using the system in 2016.)