Trolls, She Said Some Are Here Comments

In Internet slang, a troll is a person who starts quarrels or upsets people on the Internet to distract and sow discord by posting inflammatory and digressive, [1] extraneous, or off-topic messages in ancommunity (such as a newsgroup, forum, chat room, or blog) with the intent of provoking readers into displaying emotional responses[2] and normalizing tangential discussion, [3] whether for the troll's amusement or a specific gain.

Both the noun and the verb forms of "troll" are associated with Internet discourse.
However, the word has also been used more widely.
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