An interesting concept. I wonder, is it possible to create a script that will make your computer "disappear" from the network as though turning off and then "reappear" as a new machine with a new MAC address and name chosen from a list, without having to reboot? Furthermore, if that is possible, is it then possible to create a program that could run in the background and switch your MAC address regularly - say, once every ten or fifteen minutes? This could make it appear as though you are in fact a string of different customers in, say, a coffee shop. Even better would be if it could sign-in your next MAC address a few minutes before signing out your current one, the better to fool people looking at the connection logs. A simultaneous termination of an old connection and creation of a new one might look suspicious.