@subasini, Sleepless and other guys are  talking about downloading movie and making copies but to watch movies you dont have to download. I am watching since 3-4 year using same internet but nothing happended to me !!
You can just simply watch movies without downloading which is safer and better option.
enjoy the sites
http://www.watchmovieslinksonline.com/ :: this sites contain new hollywood movies! There will be many option to watch same movie , choose best rated one.
www.filmikz.net  :: this contain almost every movies of hollywood and if you search more there are some bollywood movies too.  There are lots of documentry too (pardon me for this site, there is huge option for porn movies too ) .
bharatmovies.com and youtube itself are huge source of bollywood movies !
Enjoy this sites without worry , just remember dont download anything from this sites. just use internet based flash player !