MAC filtering is useless as a security feature.In my case I have MAC filtering enabled on the Router. And if changing I can not connect to the network.
http://www.zdnet.com/blog/ou/the-six-dumbest-ways-to-secure-a-wireless-lan/43
http://www.tomshardware.com/forum/10881-43-secure-address-filtering
http://www.dslreports.com/forum/r26214643-MAC-filtering-is-useless-right-
http://www.maxi-pedia.com/how+to+break+MAC+filtering
http://www.dslreports.com/forum/r25677378-In-security-of-open-wireless-network-with-MAC-filtering
Just use a good WPA2 encryption with a complex passphrase.