Are those "Win a Free iPad 2!" things real?

I really want an iPad 2! But, because I have an iPhone I really don’t want to spend my money on it. So I’m looking into all of the possibilities to win one. And you know how sometimes you click on a website link and then it takes you to “CONGRATULATIONS, YOU QUALIFY TO WIN AN IPAD 2!!”. And then it asks you to fill in all of this information, take surveys, etc. Should I put my real information in there? What will those websites do with my information? And is it kept safe? Do I REALLY qualify to win the ipad? I really want one but I’m not sure if they are real or not and I don’t want any of my info to get lost anywhere.