I just posted this on a Digg submission:
This is the trouble with posting the guy's phone number on the internet. Now all of us Ron Paul supporters are left to prove a negative. There's no proof an actual supporter harassed the guy. But it cannot be conclusively said that a Ron Paul supporter was not harassing the guy either. Regardless, Ron Paul's campaign only posted the office phone numbers, so any calls to the guy's home were independently done. Any attempt to blame the campaign is misplaced.