I learned a really valuable lesson recently. Magic may be incredibly useful, but it most certainly not a toy. This lesson came to me not long after I first found the unused classroom I decided to convert into a work space in the dungeons near the common room full of *shudder* people…
The unused room had no door (at least I don't remember destroying a wall or a door when finding the place) so I thought I'd Transfigure one out of some loose bricks. It worked fairly well, but the wood never took on the complexion or wood finish. It felt like wood, but looked like brick. Oh well, I thought, it's fine. Time to lock it.
My beginners books had simply bored me to death, and most of the spells seemed absolutely foolish, only effective against muggles and un-studied wizards. Well, I don't hold these children in very high esteem as it is, I doubt anyone but a professor would be able to break even a simple locking charm. Unless they were a fan of explosions, I doubt they'd be foolish enough to try that foolish Ali-baba and the Forty Thieves method.
"Colloportus!" a simple click told me it worked. Now to test it.
"Alohomora!" another click, I reached out and the door opened freely. This required further testing.
Four hours later my mind was beginning to slip, possibly because I'd missed dinner and it was nearly midnight I lost my rhythm.
"Alohomora, alohomora!" and the lock fell out of the door, hitting the ground with a lite clank.
Oh well, when in Rome, I aimed my wand at the brick-looking wooden door, who needs a door anyway?
"Open Seseme!"