Chapter Discussion: Prisoner of Azkaban Ch 21: Hermione's secret

[Liz Clark]

No: HPFGUIDX 190970

>>> luirhys:
>>> 10. On a side note, it really amazes me how "important" doors and
>>> windows can be opened by a simple alohamora. Was this deliberate?
>
> Dorothy:
>  I wondered that as well because it means that locked doors can be
> easily opened by 11 year olds.  What good are locks, and why have
> them?

Liz:
I had a thought about this, most locked doors are in corridors, and 
magic is not permitted in corridors, so the kids would be breaking 
the rules and certainly risking detention and possibly explosion.

It appears, in the WW, that kids are given much more responsibility 
and trust than we Muggles would give our secondary school kids. 
Having no set bedtime for example means the kids alone are 
responsible and trusted to make sure they get enough sleep and can 
get up for lessons the next morning. So, I believe they are trusted 
not to open doors that are locked, as these doors are usually locked 
for a reason. Fluffy behind one for example!