Here is how I view it.

1) Cracker - Obviously someone that cracks things. Whether they are cracking a login, a serial number, encryption, or whatever.

2) Hacker - People that have a thirst for knowledge, usually involving electronic devices.

IMHO, Crackers are hackers, but they are usually using there knowledge not to benefit anyone except theirselves, even if it is hurting someone. For example, web site crackers. They crack a web site and throw up their handle so they can seem cool to their peers, meanwhile not caring that they are hurting someone's business that the person worked all their life to create. But then their are the crackers that do benefit the field. Cryptographers for example. So we can't really say that all crackers are evil, just like we can't say that hackers are all bad just because of some trouble makers.

What it comes down to is not necessarily what title you hold, it's what kind of person you are. There are good people and there are bad people. What you do with your knowledge reflects what kind of person you are. If you crack a site and ruin someone's business, then you my friend are an *******. In my opinion, yes you are a cracker because you cracked, and you most likely are a hacker because your thirst for knowledge eventually led you to learn how to crack. But you are an ******* as a person.

So basically IMHO, some people suck and some people don't. :-)