That is so cruel. HOw could you do that. I'm closterphobic, and the thought of being locked in a oom like an animal freaks me out. Why woudl someone do something like that to a toddler? That toddler can't properly communicate his feelings, as there is not enough vocabulary to get into extensive. Hey may want to be comforted, and to hold the door closed and lock them in that room would make matters worse. If I were that toddler, I'd destroy that room, scream to the top of my lungs, and bite my parents to show them for ignoring me. I'd make their life miserable. I'd teach them a lesson, and I know toddlers who become aggressive for this very reason--cio.
I know one who now destroys the room, bites open flesh, bangs her head, kicks the walls, screams to the top of her lungs, bangs the door with her fists, and punches her mother and bites her if she is left to cio for even a few minutes. See what happens?