AWOL:
What about the morality of this one?
http://arduino.cc/forum/index.php/topic,69685.0.html
Helping with homework assignments does have a ethical element, but does not carry the same danger/safety issues as helping the inexperienced with using AC power questions in my mind. I can just passively ignore request for homework help if I wish, ignoring people wishing to wire up their arduino to their house mains is a little harder.
Lefty