I wonder where this school is?
When you pass a building to get to a places of safety, there are certain precautions which have to be taken into account, so don't worry about so much about that.
The Alarm going off is unfortunate, but it should be taken serioously at all times and I doubt you see persons going to investigate it as you should be evacuating. The engineers should have considered that when specifying what goes where, ie heat detector in science labs.
Exams are always dodgy. Normally, students are informed through notices that they should ignore an alarm when sitting an exam and only evacuate if the staff instruct you to do so. They have back up papers if you do have to evacuate.
People wandering off during a fire drill could cause major headaches - Thats down tothe teachers. If the fire service turn up and not everyone is accounted for, the S88t hits the fan and they'll dissapear inside.
Your headmaster sounds like a di*k. I'm sure the Governers would be interested in that one. Find out who your teacher govener is and try talking to them.
Just because your school is big, doesn't mean it's unsafe. People will have spent a couple of years designing it and pleny of people will have had a say in lots of areas - especially fire. I bet you see a lot of doors about which have furry bits up the side of them.
False alarms are a pain, but they should be taken seriously. The people near the fire though will notice it, plus they will alert others, so the people in immediate danger will be aware of the seriousness of it. Everyone else should do what they do and evacuate like everyother time. Just they'll find out it's real a bit later.
Chris Houston I think was refering to a thing called Fire Management, which is ensuring that the building is safe as far as the "Fire Strategy Document" for that building reccommends. It gets complicated after that. The building will be fine as far as the law goes, some fire officers probably won't like it, and as long as you get out when you hear the alarm then great. As I said, mention it to your teacher govener, they should take notice.