Originally Posted By: tfabris
No. Many wireless adapters have the capability to sniff in promiscuous mode these days. No guesswork required. Just sniff and look at the packets in the air.


Not even "these days". Pretty much since 802.11 existed. (not a, b, g or n, but the base wireless standard way back when)

Your analogy of tissue paper I think is still too strong. MAC filtering adds exactly 0 security to a wireless network. It's simply a feel good thing, much like the TSA.