Is Internet Addiction Real?

Just as many people out there who argue that internet addiction is a real disorder, there are as many who argue against it. Who's to say if you are addicted or you just use the internet a lot? I know people who read 3 books a week, how come no one has come up with reading addicts? Work out addicts? TV addicts? I might be guilty of being a TV addict myself. If internet addiction becomes a real disorder, where will we eventually draw the line? Anything can be made into a disorder at that point.... If we make IA a real disorder, is it a slippery slope??? What is the differnece between a passion and an addiction? What do YOU think?