This will answer all your questions: http://catb.org/~esr/faqs/hacker-howto.html
Still, considering that the term has morphed once again into something greater ("life hackers" etc.), I don't see a real danger in the name of this site. Never mind that we've got way more capitalistic neo-yuppies here than phreaking aging hippies…
But why, you may like to re-read my question, as i already mentioned above, people think hacker is not a person with good motives. Who is playing the role here between you HNers and the people ?