A form of
denial-of-service attack perpetrated by
hostile newbies at the expense of
discussion on
Usenet. The first well-known
newsgroup invasion was inflicted by denizens of
alt.bigfoot and
alt.tasteless upon
rec.pets.cats, and amounted to several
tasteless folks flooding the
froup with posts about
eating or
torturing cats.
Just as rude people IRL tend to rationalize their rudeness by saying, for instance, that they are only rude because people are assholes, so do newsgroup invaders and other net abusers (such as Son of GORTICIAN in the writeup that was formerly above), rationalize their abuses by calling their victims "fuckheads" or the like.
Participating in a newsgroup invasion violates the Acceptable Use Policies of most ISPs and other Usenet sites. If your site sysadmins are awake, you may lose your Usenet access, your account, or your genitalia.