In Eclipse, when I start a new Project, I go through the wizard, and when I get to writing my first class for that project I am asked to select a package. Sometimes out of laziness I just choose the default package.
The wizard warns me this is discouraged. Even if I ignore the warnings I never have any problems with the application due to this. Or at least, so far I have never had any problem.
So why does Eclipse want me to create a new package?