So, some schmuck waves a little wand around, or whatever the hell these magic-types use, and closes off an entire town from the outside, trapping everyone inside, and then does something screwy like snatching other people from God knows where to dump them in this locked down town. [He's got a face like stone, buddy.]
What happens to anyone who tries leaving? They get zapped like a bug against this magic barrier, repelled? We talking instant death or getting knocked on their asses? And for that matter what about traffic? How's that work?