My guess is people that thought they experienced the 'ticklers' were just victims of the power of suggestion, albeit the rumor that the effect existed. Thus they honestly thought they were experiencing something that apparently wasn't there.
Some of those 'experiences' were just a few months ago, if you read back through the thread. As I said before, at least now I feel vindicated from the believe that I wasn't able to experience an effect that others say existed, and I even paid attention to on rerides since others said it existed. I'm not crazy after all.