Bureaucrats only expect compliance under threat of punishment. Other people will figure out, even if only by trial and error, how to break any system at its weakest points. See Kevin Mitnick on 'social engineering', or--if you are the sort of authoritarian who won't listen to a felon but is impressed by prizes and tenure--any anecdote by Richard Feinman. I can also thoroughly recommend this post by edjog of the Distreputable Lazy Aliens website:

I don't usually go into much detail about offences I committed whilst in active addiction, for a number of reasons which are beyond the scope of this post but, with the UK Government's headlong rush toward ID Cards seemingly based in much part around the notion that such a scheme will reduce crime, it seems appropriate. I've been prosecuted for what I'm about to talk about anyway: paid my debt to society and no longer commit crime. You don't think a self-confessed law-breaker has anything relevant to say about this issue? Fine: bury your head in the sand; it's your taxes paying for the scheme.

Read the whole thing, as they say.

The author has kindly offered NO2ID syndication rights, so any magazines interested in new angles on the lamentable scheme for a non-webical audience should get in touch.