[zevyoura]

Not sure about RT, but IMDB has some fairly strict rules about how their data can be used. http://www.imdb.com/help/show_article?conditions

IANAL but from my reading it sounds like non-commercial use is ok.

[rcfox]

I'm also not a lawyer, but I think you'd have a very hard time litigating for user-contributed content that has no creative value and is publicly available for download.