^^ Whilst I feel for the people who have to get out of bed and stand outside in the cold for ages whilst the halls are being checked, I went through it last year when I was in halls. Its the risks that are being taken that really wind me up. The fire crews get the call and go on blues and twos to the halls, this is risking both the crews and members of the public, however careful they are there is always the risk of accidents - this calculated risk is offset by the risks of a fire - if there is a fire. If its a hoax call though, or a false alarm there is no risk by a fire, but there is still the risk of accidents when the are travelling to the call. Also, as has already been said, while there are 2 pumps at the uni checking the halls are clear etc there could easily, and probably are other calls to genuine fires, which end up having to wait longer for a reponse because some idiot thought it was funny to set off a fire alarm.
There is also fault on the univeristies part as well, they should use heat sensor alarms rather than smoke alarms - esp near kitchens as these go off when they sense the heat of a fire, rather than just burning toast! These are perfectly good, and have the same 'success rate' as smoke alarms, but are more expensive! I don't know how other unis deal with it, but last year when I was in halls, if nobody owned up to the false alarms then the money the fire brigade charged was taken out of the deposits we had to pay at the beginning of the year. They didnt put any effort at all into finding the culprit, just penalised everybody. I was off ill for 4 months, but still had to pay towards all the false alarms when I was miles away!