Yes, if your root password is God, you deserve to get hacked.
But, while it's not impossible to get infected running Linux, the chances are slim. Just use some common sense and don't enter your root password unless you know why your doing it and the risks involved. Don't download software from the Internet, use the repositories. Stay away from bouncing bunnies.
You don't need to update your software all the time, but you do need to keep up with security updates.
One of my favorite sites is LinuxSecurity.com.
Here is a great article to start learning basic security:
Linux Security for Beginners - Table of Contents
Work smart and Linux will treat you right.