As sophisticated body modification becomes increasingly common, an underground will develop. There will be people who outwardly look normal, but have a series of illegal implants, mostly made with 3D printers. These devices will allow people to change their body shape at will, and some of the more sophisticated implants will allow hair growth or color change.
This will be especially popular in the criminal underworld, as it will allow them to change appearance to such an extent that they are unrecognizable. The most notorious of these will be a gang out of Russia called The Wolves, who literally shift appearnce to resemble wolfmen. These real-life lycathropes will live as a gang in the woods outside major cities, and will shift into wolf form at night to run rampant, commiting crime sprees with wild abandon.