At every step of the way in life today, we sign off our privacy on those 'fine print' legal stuff without thinking or even glancing at the headings. Who reads that stuff anyway? Quite a few new media creations are like that too - Facebook, Yahoo etc which require you to go through the gazillion words and click on 'I Agree' before you open an account.
We could be anyone on the net and express ourselves like we have never before. But so is true for the other people who do not have honest intentions all the time. We have come to know & use the technology too fast, without fully realizing the consequences - good and bad. While Facebook, chats or twitters (on internet) can be great for communicating with friends and relatives around the world, the medium of internet is an organic open road, prone to any hitchhiker. New media and its relative components are a great advancement in technology, communication & lifestyle, but like every other invention in the past, it has to be approached with proper information literacy education to the users.
There are apparent dangers in publishing our information online. A recruiter can search by your name and find out your activities, affiliations & comments from Facebook, LinkedIn, Twitter, blogs etc. A stalker can put together pieces of information and find out where & what you are in real world. Many a times, people invite trouble just by putting all personal info for everyone to see (I know at least one person who does that). While in today's age, much of our activities including paying bills & communicating happens online, we need to be extra careful in understanding what is it that we are signing off on those papers & be always skeptical in putting our personal information online.