The philosopher's stone movie was on TV last night, and as I was watching it, it made me consider a number of things. This is true for the book as well as the movie, but knowing what we do now, why didn't the professors better guard the Philosopher's Stone from Voldemort? I mean in essence, they pu *** below the feet of a three-headed dog in a corridor that could be opened by a well-read first year magic student. After that, it was a series of obstacles easily enough overcome by first magic students.
I asked myself first, why teach a first year student the alohamora spell? Then I realized that most places would be easily enough guarded against it. I'm sure a simple spell can be cast on a lock to make the spell useless. Second, why not simply make the third floor corridor unplottable? We know the professors and headmaster can do it? That said, doesn't it strike anyone as strange that the Philosopher's stone was so poorly guarded, considering its significance, compared with other things throughout the books?