I was just reading about Alien Encounter, and I need to go off on that for a moment because I'm amazed at how vague and not-nearly-emphasizing-this-enough some of the signs were.
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It's basically the same "dark and your kids might not like it" warning you would get on the sign for something as goofy as Honey, I Shrunk the Audience.
I see slightly better signs on the image search, I don't know the exact set up, but I'm guessing they expected the more-detailed attraction description sign to do the heavy lifting and the fact that there were extra signs at all was supposed to get the point across, but compared to, like, Dinosaur's warning signs, which are bigger and more specific (Dinosaur has scary dinosaurs), it just seems very unhelpful.
Don't get me wrong, the thing still says "terror " right in the name and I still blame people for getting on it, but I was expecting, like, "WARNING: THIS IS A PURPOSEFULLY R RATED EXPERIENCE INVOLVING VIOLENT DEATH AND EXTREME PERIL". Maybe if they found a way to point out the part where you get "blood" rained down on you people would have stayed away.