According to some reports that I have read [if my memory takes me right] downloading movies over the internet for free is really a legal action. Well, for my personal view of the issue, it's actually a type of piracy. If you're trying to duplicate properties that are copyrighted or any stuff that is under protection by it's proprietor, it's absolutely a general crime.
So you know it's a crime, are you still going to perform free movie downloads? If you care about your self's welfare then do not do such thing, it would ruin your whole life if you're caught by the authorities.
Why get into trouble when you can have what you wanted in a safer way? You can download thriller movies in Vongo and TotalVid by just a fee of not more than $5, or download drama movies in CinemaNow and Amazon Unbox for less than $4, or just download fantasy movies in Apple - iTunes and Netflix for less than $5. Well, i know these company offers good services and of course all of them does legitimate business.
If you're still unsure of what movie are you going to download you can take some sort of research about what are the new movies that is worthy for your penny. Try to google it out or read allmoviesearch.com for it's sophisticated information about the movie industry.