I've always wondered what is the reasoning behind the various, so different security policies around the world. Here in Rome, virtually all banks I went to in the last 5 years have security guards; most of them have metal detectors; very often security doors where you actually walk into a boot that can fit just one person, you are scanned by metal detectors while personnel watches on monitors, and you are actually weighted too (!!).
Sometimes, which is very annoying, you have to leave all metal in security boxes before you even try to get in or doors won't open (including keys, mobile phones, sometimes belts and pens too).
Sometimes I wonder if that's all useless. I don't know.