No, we don't like this either.
Certain states in the United States have enacted laws that require some sort of age verification before sexually-explicit content can be displayed to a visitor. We have no choice but to comply with these laws.
In order to view trailers and sexually-explicit images, you must log in, or create a (free) account. We are very sorry for the inconvenience.
We feel these laws are unconstitutional on their face, and do not accomplish any goal except to attempt to ban adult material from the internet. If you agree, we strongly recommend that you contact your state representatives, and tell them your feelings on the subject. We really like ResistBot as an efficient way of getting your message to elected officials.
The Free Speech Coalition has more information here.