There are spycams that comes with an eyeglass and shades as well the also have pen cams that has built in 2gb memory and a usb to transfer the files.

A friend of mine once told me it I didn't buy however because I thought it deemed no use. Until I read this goon squad. Now I want one.

Yes, they are basically cheap you can get one worth 2,000-4,000 pesos and it's made in china. I haven't tried it yet though.