Shaving is like Mexican Killer Bees- not a real threat, but the issue resurfaces every time its a slow news day.
However, ClickTruth is one option. It is still in a beta period with 3 sponsors submitting to the auditing and a few others implementing the back end scripts right now, but
http://www.clicktruth.com is working towards giving us some peace of mind.
You might ask your program if they would be willing to be audited by a third party.