You can also download full TV series that are currently still available on Netflix and full movies and lots of other stuff. I'm all for archiving, and I think they'd have a case if this were Abandonware or Lost Media, but I fear that a lot of stuff on there simply isn't and their ambivalence towards flagrant abuses of copyright is going to get them repeatedly sued.
It's annoying, because IA is a wonderful resource and it would be a shame if they get sued out of existence.