hm, did I cross the line? I don't think I crossed it either. I
  made some kind of virus once, never released it. Hacked into a
  few accounts, some successfully, some not, left a note saying,
  "I was here", got caught and stopped.

  But I like knowing _how_ the systems work, so when I want to
  accomplish something, I can do it. [getting data I need for a
  project usually]

  So, I'd say my integrity is in the "be reasonable" line. Neither
  anti-nor-pro.