VOIP Spam–How bad is it?

I've been reading this week about NECs VOIP Seal anti-spam tool. VOIP Seal can detect if a call is computer generated and block it based on voice patterns. Alec Saunders also touched on it and pointed out that iotum is already anticipating the need for SPAM blocking with simple call screen capabity. GrandCentral does the same; they've got a SPAM registry where you can nominate the worse offenders so that everyone can block their caller IDs. While I'm sure we'll be hearing much more about the woes of phone SPAM in the future, I hope it's something we won't look back on and think, "If only we had done something back then…" In today's report on M&C Tech News, they report the following statement from NEC: “the existing infrastructure for producing spam e-mails (so called "botnets") can easily be modified to also produce spam telephone calls. Today, the number of spam emails is higher than the numbe...