What if people change their personalities?

An interesting talk out of the first BarCamp UAE last Saturday was about people exhibiting transparency throughout various social media tools that they use. When you are interviewed for a job, they will check your facebook, twitter, myspace, cyworld, etc. to figure out who you are. Your words, your thoughts, your opinions followed by the interactions with others will be engraved in this digital world and tag along with you whenever you go. How does that feel?

Funny thing is, I tend to have a very different 'self-portrait' on each of those tools. Just as you don't speak similar language/vocabulary with different types of groups in your life, my behaviour patterns are governed by personality that I choose to present in that specific space. On top of that, I tend to move away from heavily-crowded services where the interaction is a must component. I sometimes need my own space and tend not to actively pursue such interactions. (This is also why I recently restarted blogging.)

If somebody tracks those accounts across various web 2.0 serivces, would he/she have a fair picture of who I really am? What if I don't agree any more to some opinions I have made on some websites some years back? Does this still define who this person is to some people out there?

Scary, isn't it? Such rapid developments across social media space will define you who you are to other people based on tracks that you have left behind, with or without your consent. There will be better tools soon coming out to help others define you more, specualte your tastes and attitude. So,... what if people still do change? what if I am not a person who I used to be? How can you get away from such biased minds out there?