I feel it's worth pointing that facebook makes it easier to identify and locate people who end up in prison without trial and so on.

For a little while I've wandered into the business of finding the identity behind an online account and finding the physical whereabouts of said person for private companies and state police. It was in the pre- and early facebook era and it was sort of detective work, picking up details and clues, cross-referencing data, some wild guess and luck. Then facebook grew to the monstrous thing it has become, and now these past employers do not require external contractors to do this kind of job, they just go to facebook and do the job themselves in little time.