I am a guest on a wireless network tonight and, although I had the WEP key from the last time I was here, the owner has added MAC address filtering since then.
Rather than faff with the security settings of the network I snagged a few packets and copied the MAC address off another computer that was using the network at the time.
My thinking is that two physical devices with the same MAC address would appear to be one physical device with two IPs, then each computer would discard the packets with the wrong IP.
Both computers were online at the same time and seemed to have no problems. My question is, was I causing trouble and the computers were just coping with it, or is this a perfectly acceptable thing to do?