Originally Posted by Joe Obenberger

My best guess is that it's a function of the extent to which they take their lawyer's advice, which is usually going to be on the safe side of having a warning page, versus deciding to depart from the safest practice because of how they read the odds of any real harm and their best guess about lost traffic revenue. Given the advantages that come from having a binding contract with your visitors and members, I think that it should be an easy decision. If the content is strong, it will attract. Who has ever stopped watching a clip because it has a three second 2257 Notice? IF a site puts some creativity into a warning page, it can actually work to promote and excite the visitor.