Obviously the example is extreme, but it still applies in other scenarios since polls often predict outcomes. Take Brazil for example. Presidential elections a

Obviously the example is extreme, but it still applies in other scenarios since polls often predict outcomes. Take Brazil for example. Presidential elections are about as high stakes as they come, they have been electronic for decades and election results pretty much always align with polls. There are no known cases of tampering despite the high amount of chronic political corruption. Failure modes in the system are much more mundane: buying votes, manipulation of lower classes (so called "voto de cabresto"), smear campaigns and the like.