There are complete scripts of WDW attractions all over the internet. All of the sites have disclaimers stating that they are fan sights only (i.e., they make no money), and that they have no affiliation with WDW, the Disney Company, or its subs. I think this keeps the lawyers at bay.
Plus, I think alot of these sites generate tremendous free publicity for Disney, Universal, etc. I don't know why they would want to file suit on these folks.