What actually bugs me somewhat more about this case is that it seems they were only caught (if indeed it was faked) because they faked it badly. But what if a pollster fakes their polls more intelligently, such that they look legit to at least most basic statistical tests? In well-polled areas, especially (e.g. presidential races), it seems like it would be difficult to distinguish between a real pollster, and a fake pollster who took a bunch of other polls and ran them through a "generate random-looking result roughly similar to these other polls" function. As long as your distribution looks right, and your absolute numbers are roughly in line with the pack, it seems like it'd be hard to prove that you didn't actually robocall anyone.