The article discusses how phone companies detect tethering, but the content is not available. Commenters discuss the practice of charging extra for tethering, with some arguing it's unfair and others seeing it as a way for companies to manage data usage. The conversation revolves around the concept of net neutrality and how companies should charge for data. Some commenters argue that charging for tethering is a violation of net neutrality, while others see it as a necessary measure to prevent excessive data consumption.