Comcast recently launched a program that will turn each of its residential customers’ Xfinity routers into a public hotspot. Starting a few weeks ago in Houston, Comcast says the program will make its way to millions of homes across the country by the end of the year. The program lets any Comcast customer access any other Comcast customer’s Wi-Fi after first authenticating their Xfinity account. That means Comcast customers gained access to free, high-speed internet in a whole lot more places. Worried this means people will tap into your Wi-Fi and slow down your network? Comcast says don’t worry – only five people can log onto a single home network at once, and its network was designed to handle that stress. Whether or not that’s true remains to be seen. Comcast is automatically enrolling every customer with a new Xfinity router into the program. If you want to opt out, and keep your Wi-Fi private, secure and all to yourself, all it takes is a phone call to Comcast.