If there's one thing I learned in politics, the biggest hack is in having a great narrative. Ultimately, brands, companies, and politicians are characters in our consciousness that only achieve meaning through the stories they tell.
Essentially, the story must be believable and ring true to the audience being targeted according to their past experience. For example, evangelicals love a good redemption and hard work story. Each group has their own highest morals. I'd recommend "Don't Think of An Elephant" by George Lakoff, which explains how politicians hack the human mind by crafting an entire language that plays into their hopes and fears.
I'd love to have every test in life be genuine and unhackable. But when tests are clearly so hackable, it doesn't help to not call out how the hack works. Call it responsible cultural exploit disclosure.