What is the best option to protect our Laptop? Because any MacBook Pro in a table can be easily pick up by thieves, and we do have always our current work there (though all backed up, by Dropbox or external HD), my question is


  Should we protect the access to our hard drive? 


You would probably, if you travel a lot say yes, but


  What software should we use to protect our work with a password?


... and, for example, after 3 wrong attempts, maybe erase all folders that we specified without an option to get it back?

Kinda like what iPhone give us in a business environment that we can, remotely, erase all personal data.
Install Prey.


  "Prey is a lightweight application
  that will help you track and find your
  laptop if it ever gets stolen. It
  works in all operating systems and not
  only is it Open Source but also
  completely free."