No, shit doesn't just happen. If you get sued for copyright infringement cause someone else broke into your network and downloaded Harry Potter and you LOSE, well, "shit happens... deal with that" right? NO, when the world isn't fair, you don't roll over and say "Shit happens". You change it and make the world a little bit better. Isn't that the goal of all entrepreneurs? And isn't that the goal of HN then? We want the world to improve and leaving an incompetent teacher in the classroom goes against every thread about Khan Academy or improving the educational system. You want me to be wrong so bad that you've forgotten the principles that HN is about. Entrepreneurship is about making the world BETTER while making some money off of it (or am I naive? I suppose maybe I'm too optimistic) and rolling over is not the right thing to do.
P.S. I dealt with it the best I could. I signed up for summer school then had a talk with the head of the science department who then investigated it. It was revealed to us that the physics teacher would be fired, but then because we couldn't find any replacement for her on short notice and because the science head was about to take maternity leave, the matter was dropped.
