Comment Re:WTFBBQ (Score 1) 217
So just have 2 sets of doors and arrange so that they cannot both be open simultaneously - ie an airlock type system. The first set of doors is open and the second closed. People pass through the 1st door, the door closes and the 2nd door opens to allow the people to exit. The second door will not close (and the first remains closed) while there is anyone in the area between the doors. This means that if someone does try to go the wrong way, they will have to turn back and exit through the door they entered by.