Why it is dangerous
It is possible to go a long time without getting caught while downloading illegal movies (or any files). But just like playing with fire, you will eventually get caught. Ip scramblers, file encryption, even deletion do not cover your tracks. Your internet trail is forever engrained in the history pages of your internet service provider. Once the production company gets wind of what you are doing, they are not hesitant to take serious action. If you are lucky, it will begin with just a warning. But once they have evidence that you have been stealing. They can take you down. Literally, thousands of Americans are stuck in the middle of copyright infringement lawsuits, and some will be for a very long time.
It is too easy
While it may be easy and very addicting. It is not worth the consequences and it is most wise to avoid such schemes. Wait for the DVD, or Blu-Ray.