While the word ‘hacker’ to refer to someone who enjoys playful cleverness is most often applied to computer programmers, it is sometimes used for people who apply the same attitude to other fields.
OMG, this and a few of the other Wikipedia articles have me convinced: I’m a hacker, and I didn’t even know it! This is not to be confused with cracker, the evil version, but instead refers to open-sourceness, anti-authoritarian, fun and non-malicious playfulness. And April Foolery! Woot!