This is why people were urged to put affidavits together to prove they voted for Paul. Get it in writing with a pollster's sig and notarized.
That is not practical since it requires substantial time & effort investment from each individual voting and it would be difficult to get near 100% cooperation.
We could get much more bang for the buck if we select few
random precincts (not known to anyone in advance) and have
observer teams which would count all Ron Paul votes (by setting up a well marked post outside) as well as the totals of all votes in the precinct. These counts would then be compared with the announced counts for the precincts. The method requires almost
no effort from the individuals voting and
no cooperation from anyone but our own supporters (to come by the post and show thumbs up or maybe sign in). Since any cheating would need some kind of advance rigging of software, the random selection of precinct would discourage cheating anywhere. Once major discrepancy is caught, one can call out all Ron Paul voters at that location and have them sign affidavits in order to pursue it in the courts.
The major benefit of such systematic well publicized fraud prevention effort is not so much prevention of the fraud, helpful as it is, but the
morale boosting effects -- it is much harder to motivate people to do much who have doubts that the
effort is a waste anyway due to vote fraud. Further, the supporters are much more willing to do their share when there is a clear evidence that at least some folks on their side
know what they are doing in contrast to perceiving their campaigns as incompetent.
Unfortunately, the time to think of and prepare for this kind of monitoring was back in December. Hopefully, by December 2012 we will be smarter about all of this. There are also much more fraud-proof schemes discussed at blackboxvoting, but these would require much more effort and/or cooperation from the state election bureaucrats.