The question you highlighted, for the most part seriously. It is by definition the Official website. If it can't be trusted then what can? I understand that mistakes can be made on the website, however a company the size of Disney would have a whole group of people making sure that their website matches company policy, and this specific "error" has been there for a while now.
I do agree with you that sueing over such would be extreamly silly, however it begs the question, is this the only "promise" on their website that they selectivally fulfil, or are their others? If there are others, then individially they may not be a big deal, but collectivally maybe they are. Or if this IS the only one they won't fulfil, why not?
Let's face it there are some rides (not many) that are extreamly scary to some kids (Tower of Terror, Rockin Roller Coaster, Space Mountain, Expedition Everest, etc) even kids that are tall enough to ride. Is it really the right thing to ask a parent of such a child to wait for the others to ride, then have to go through the standby line all by themselves?
I'll be honest I'm a bit biaed. I have an 8 year old daughter that doesn't care much for Roller Coasters. I am hoping that she will ride (and enjoy) space mountain. If not, there is no way we can go through standby twice, so either my wife or I will have to miss the 2nd time around.