That part about malls and dress code is not really true. I've been in a few malls in Dubai and was quite surprised to see girls/young women walking around in shorts and stringy tops.
Don't believe everything you read on the internet.
But it twas a while ago, so I'm sure some elements have changed.
However it was the same back then - shorts n stingy tops (westerners of course)
But re the school the poster was talking about, no stringy-ness allowed.
not even string vests!