United Airlines is taking a stand against one of the most annoying in-flight behaviors: playing music without headphones. The airline has updated its contract of carriage, explicitly stating that it reserves the right to deny boarding to passengers who use personal devices on speaker. This new rule, which came into effect on February 27th, is a clear message to passengers that using headphones is not just a courtesy but a necessity. While this may seem like a small change, it has significant implications for the flying experience, and it's one that many travelers will appreciate. But what's the reasoning behind this decision, and how will it impact passengers? Let's dive in and explore the details.