He works undercover, has an online identity which he cannot reveal to anyone for fear of exposure and has to maintain anonymity or face threats to his personal security.

In the murky world of organised crime and piracy, the investigator known only as Mr X has the job of, in his own words, "cleaning the internet of some of the filth out there".

http://news.bbc.co.uk/1/hi/technology/3751195.stm

If once a man indulges himself in murder, very soon he comes to think little of robbing; and from robbing he comes next to drinking and Sabbath-breaking, and from that to incivility and procrastination.