Beer Goggles: Thinking about it, those shelters need to be fairly easily-accessible so that escape can be possible in such emergency situations, like evacuation perhaps. It still seems stupid, though, that Toji and Kensuke were allowed to so easily escape.
Reichu: Well, Kensuke did need Toji's help… I wonder what that entailed?
Hexon.Arq: Lookout, probably. (Security my ass.) Either that or "POW!!!"
Reichu: Yeah, that was my thinking as well. Still, any emergency door that can be opened by a 14-year-old jock probably needs a bit of work… Or the lookout theory is correct, and Kensuke just hacked the door open with his laptop, R2D2-style.