People so quick to agree to kill off the old ?
I loved this movie, and while most of it is well done,
some things didn't seem very realistic:
1. Young guy tells them all to pick the old people first, and they do so without much argument at all !
It's only after killing 5-6 older people do they start to decide against it
2. People were way too calm - there'd be MUCH more panic and hysteria seeing people killed left and right of you...