Aw man, isn't a trip to Disneyland a rite of passage, regardless of whether you realize the characters are people dressed up? (Which I would have thought was obvious even to the non-HG, let's be honest.) I don't think the point of Disneyland is being fooled into thinking they're the real deal. That would be like never watching movies again because you know they're all just actors ...
For the record, Tokyo Disneyland is the BEST. Imagine a Disneyland where the entire nation is fanatical about cuteness, cartoons and dress ups smile