XDA Developers on MSN

Your router's MAC address filter is security theater, and here's what actually protects your Wi-Fi

MAC address filtering sounds like home network security, but it’s easy to bypass and mostly creates more hassle for you.
Ars Technica

does mac filtering still work if the device has already connected to the Wi-Fi;

MAC filtering never really works. Anyone wanting to get on the wifi can just run a sniffer for a few minutes, find a MAC that is allowed and use it on their device. MAC filtering is useless. As for ...