Society could be disrupted by the availability of new "immoral" products. New products and lifestyles may cause significant social disruption. For example, medical devices could be built into needles narrower than a bacterium, perhaps allowing easy brain modification or stimulation, with effects similar to any of a variety of psychoactives. Most societies have found it desirable to forbid certain products: guns in Britain, seedless watermelon in Iran, sex toys in Texas, various drugs in various societies such as hashish in the United States and alcohol in Muslim societies. Although many of these restrictions are based on moral principles not shared by the majority of the world's population, the fact that the restrictions exist at all indicates the sensitivity of societies—or at least their rulers—to undesired products. The ability to make banned products using personal factories could be expected to be at least somewhat disruptive to society, and could provide an impetus for knee-jerk and overly broad restrictions on the technology. New lifestyles enabled by new technology could also cause social disruption. Whereas demand for banned products already exists, lifestyles develop over time, so the effects of lifestyle change are likely to be less acute. However, some lifestyle possibilities (particularly in the areas of sex, drugs, entertainment, and body or genetic modification) are likely to be sufficiently disturbing to onlookers that their very existence would cause ...