The ISPs hate VoIP because it sucks up bandwidth, telcos hate it because it’s a mortal threat to their business model, and companies that sell network hardware and traffic analysis/shaping technology are out to make a buck by throttling it for The Powers That Be. In a recent Wired article, Bruce Schneier highlights a threat to VoIP that I rarely see considered in news coverage of technology: call endpoints are vulnerable to local, PC-level compromise, and VoIP network traffic is vulnerable to everyone from the feds to criminals. Internet telephony’s threat model is much closer to the threat model for IP-networked computers than the threat model for telephony.