net.police: /net-p*-lees'/ n. (var. `net.cops') Those USENET readers who feel it is their responsibility to pounce on and {flame} any posting which they regard as offensive or in violation of their understanding of {netiquette}.

:net.police: /net-p*-lees'/ n. (var. `net.cops') Those USENET
readers who feel it is their responsibility to pounce on and
{flame} any posting which they regard as offensive or in
violation of their understanding of {netiquette}. Generally
used sarcastically or pejoratively. Also spelled `net police'.
See also {net.-}, {code police}.
-- The AI Hackers Dictionary

Related:

• net.police /net-p*-lees'/ n. (var. `net.cops') Those Usenet readers who feel it is their responsibility to pounce on and flame any posting which they regard as offensive or in violation of their understanding of netiquette.
  Generally used sarcastically or pejoratively. Also...
• paper-net: n. Hackish way of referring to the postal service,
  analogizing it to a very slow, low-reliability network...
• sneakernet: /snee'ker-net/ n. Term used (generally with ironic intent) for transfer of electronic information by physically carrying tape,
  disks, or some other media from one machine to another...
• pain in the net: n. A {flamer}. --
  The AI Hackers...
• net.-: /net dot/ pref. [USENET] Prefix used to describe people and events related to USENET.
  From the time before the {Great Renaming}, when...
• voice-net: n. Hackish way of referring to the telephone system,
  analogizing it to a digital network. USENET {sig block}s...
• Police are examining all internet packets in the search
  for a narco-net...
• thanks in advance: [USENET] Conventional net.politeness ending a posted request for information or assistance.
  Sometimes written `advTHANKSance' or `aTdHvAaNnKcSe'...
• despew: /d*-spyoo'/ [USENET] v. To automatically generate a large amount of garbage to the net,
  esp. from an automated posting program gone wild...