Mark McIntyre <markmcintyre@spamcop.net> wrote:

> On Thu, 21 Dec 2006 21:53:05 GMT, in alt.internet.wireless , Jeff
> Liebermann <jeffl@comix.santa-cruz.ca.us> wrote:
>
> >Of course, if they change their MAC address, or introduce a new
> >computer, such QoS by IP address or MAC address is useless.
>
> This is one of the few places where MAC-address based permissioning on
> the router is useful.

If they are smart enough, they can find out what MAC addresses other
users equipment have and "borrow" one of these.