I don't think people here are suggesting that this is the only vector of attack against your system, rather that given the proliferation of unsecured WiFi networks it's just one of the more common.
When someone brings out the "ARP poisoning" add-on for Firefox maybe it will fuel debate on other types of attack :)
When someone brings out the "ARP poisoning" add-on for Firefox maybe it will fuel debate on other types of attack :)