i wonder how well a gun is recognized when held in a shopping bag, or a postal package.

How well is a face recognized when it is distorted with tape and cotton packing.

gait analysis is another thing, i wonder how well that can work when someone puts a marble in thier shoe, or buys a second hand pair and alters the profile of the sole as well.

wearing ill fitting clothes as an under layer will alter your bodys kinematic profile as well.