This shouldn't be categorized as a liberal decision or another liberal decision. It should just be called for what it is a Bad decision. Common sense seems to be missing from this ruling. The wording just seems wholely inappropriate, sure an amusement/theme park has the responsibility for making sure a ride is mechanically safe, and shouldn't normally pose a health risk to the average tourist, but that is where it should end. Things should not be dumbed down to suit every one, because every one is not the same.
An individual might be deathly afraid of ghosts and things that go bump in the night, but if they choose to freely go on the Haunted Mansion and they have a heart-attack or go crazy should the ride be shut-down or dumbed down (removing all the ghosts)? Because it posed to much of a thrill for this individual. Warnings are posted on rides and that is that, if you choose to ride then you made the choice and you are accountable for it.
I mean look at the act of smoking it has been deemed unsafe, and it poses a health risk. There is a warning on the box that this item may lead a normally healthy individual to become unhealthy. So why is it still made available to every one in the state of California? (I am not against smoking, I am just trying to draw a comparison point, I believe people should be free to do what they want as long as it doesn't negatively effect someone else.) I can almost guarantee more people die as a result of smoking in a year as do the amount of people that die in theme parks. I would even guess more people are unhealthily effected by smoking then by thrill rides.
If there is a warning placed then leave it at that people can read, nobody is forcing a person to ride an attraction. That is where the difference lies you might have to be transported some where, but you don't have to ride an attraction. If you believe it might not suit you then don't ride it.