This point is perhaps redundant, but I frequently encounter Catholics asking whether it is acceptable to watch such-and-such Hollywood movie. It isn't. It never is, unless you are doing so solely for the purpose of analysing and exposing these films.
The below videos are produced by a protestant ministry, but are worth watching in any case. Even many of the Hollywood films enjoyed and promoted by Christians are totally infested with occult, gnostic, and anti-christ themes that are not discernable from a mere "surface" viewing.
[youtube]http://www.youtube.com/embed/ELIKWm6BN2A[/youtube]
[youtube]http://www.youtube.com/embed/s7NfJhS3_S0[/youtube]
[youtube]http://www.youtube.com/embed/qvY5QQiQmrw[/youtube]
[youtube]http://www.youtube.com/embed/02XBJHrEj4s[/youtube]