Hacker News Reader

Not necessary -- someone could spoof their MAC to match mine. IMO, this is more likely when there is already malicious intent, and it's almost trivial to do.

I've used spoofing frequently on a local college's campus to get around blocks they've put on my system. Apparently some of the student use Ethernet jacks aren't for student use.

> MAC spoofing would only be relevant if you were regularly using random spoofed MACs on your own network.

Or, if for some reason that practice was widespread enough that it provided plausible deniability.

The case for MAC spoofing being common (at least with people "borrowing" your wi-fi) makes sense because some networks have MAC address based white lists, so this defense isn't quite as crazy as it sounds at first. IANAL etc.