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One of my friends is the radiation safety officer at a university. One day, he went wandering around with a laser power meter and started checked people's laser pointers. Anything over 3 mW he would confiscate. After an hour or two he'd collected a shoebox full of laser pointers. Emails started going around telling people to hid their laser pointers.
He gave me a few - some were over 20 mW.
I also recently bought a '5 mW' green for $75. On the meter it shows up as 13.5 mW. It's great for pointing things out - even in the city.
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