I just received a phone call for a political survey. It was primarily about local issues, though there were some national questions. Oddly, right after I answered that if the election were held today I would vote for Bob Barr, and the interviewer confirmed my answer, the line went dead. There was no click or anything and I assume it was a technical issue, possibly even on my end (Vonage), though my Internet connection was still fine.
However, it certainly crosses my mind that it would be pretty easy to manipulate survey results by “dropping” calls….