What is the purpose of a black person?
The purpose of a black person is the same as the purpose of a white person, or any other color. The color of ones skin doesn't mean your purpose in life is any different.
It would be defined as grey hat cracking. White, grey and black refer to the ethics of the person. White hat will only do something with consent. Black hat will do what they wish with a malicous purpose in mind. Grey hat does what they feel is right, and are not looking to create havoc. A person that bypasses security to access a terminal is a cracker, not to be confused with hacker.