ajemas said:
A couple of reasons. First of all, it's the fact that a quarter of the students ARE TOTALLY EVIL! I wouldn't want to go to class with a bunch of kinds who are essentially the Nazis of the wizarding world. Secondly, it's the fact that you don't learn anything practical other than magic. No math, science, or history, just magic. Imagine that thousands of super-powerful wizards with an 11 year old's understanding of history. Now make a quarter of them evil. (Thank you, Cracked.com).
One last problem that I have is the fact that school security is awful. Even when Hogwarts was specifically tasked to guard the Sorcerer's stone (Philosopher's stone, if you're British), it was unable to stop three 11 year old kids. And then there's the fact that they didn't figure out that there was a motherfucking basilisk living in their building for something like 20 years.
You know, that Cracked article always annoyed me, mainly because they do get magical equivalents of all three subjects. I always got the feeling that the author watched a couple of the movies, but never read a single book in the series. Hermione took Arithmancy, which is magic with numbers, they all had History of Magic, and there are a few magical sciences in there -- potions is chemistry with more potent ingredients, and botany and care of magical creatures, when put together, work out to biology. They don't get much in the way of physics, but then, when a law doesn't apply to you, why bother to learn what it says?
Edit: Also, that basilisk had been down there since the school was founded. Salazaar Slytherin built the Chamber of Secrets, Voldemort just opened it -- and he opened it 50 years before the books take place, so I have no idea where you got the 20 year figure from. [/uberdork]