The word of the day is butt call, the accidental calls you get when people sit on their phones and it dials a speed-dial number. The side-effect, of convenience, is the inconvenience of others.
More on unintended consequences, this time with respect to the US war on drugs:
Reason magazine on heroin addiction, (they have a strong libertarian bent, so you know they’re going to be arguing that the drug laws are stupid).
Criticisms and directions on how to fix US drug policy, by some guy named Randy, whom I don’t know much about,.
Note also the previously posted questions for public health students.
Other unintended consequences: intellectual properly policies that are insufficiently clear can leave you open to annoying jokesters. And failing to plan for the extended character sets of non-English languages can leave your software mocked mercilessly by the famous Joel.
Secretly Ironic 