MAC filtering is a fairly simple concept to grasp.

Don't show them that you can sniff the network, don't let them know what you can do until they trust you.

You have to make sure the danger remains on the "outside"


Trust me on this. I'm sitting in the library at the local college right now, being watched like a hawk. They don't trust me. It's kinda funny actually since I've had teachers come to me when they needed access to certain resources on the network they could not otherwise get.


EDIT: Heh... accidentally clicked post...

First of all, you have to automatically consider the line and the other machines in the house "compromised." Even if they're not, security mandates that you think of them this way and act accordingly. Your first priority has to be the security of your machine(s). Both local and domain, if that applies.

Your only priority for the router is to protect "your" bandwith. They can take whatever advice they want to. Just CYA.