It sounds like something the Alex Jones 9/11 Truthers might get involved in. They have been doing a lot of stuff “on behalf of “ Ron Paul (whether he wants it or not):using servers at overseas locations for net tactics.
It would not be too surprising to see them involved in a telephone campaign.
Voters Who Broke Story on Romney Calls On Romney Payroll
Whoever commissioned the calls wanted Romney team members contacted
Did Mitt Romney Push Poll Himself? (New National Review Article)
Romney Calls Attacks on His Faith Un-American
Risk V. Reward: The Anti-Romney Phone Calls
Romney labels calls 'un-American,' pins blame on McCain-Feingold
NH, Iowa Voters Get Anti-Romney Calls
Draw your own conclusions. The stories are written by several different authors.
Link
How hard can it be to trace the origins of the phone calls?