“…A related, but separate, phenomenon, which may seriously impact opinion dynamics, is Internet trolling. The origins of trolls date back to early Usenet chatrooms, and since the 1980s, the trolling has evolved in multiple dimensions [139,140]. They now include elements such as emotional manipulation through provocation, incivility, abuse, but also concentrated attacks representing specific views (sometimes attributed to foreign meddling in political affairs, such as the "Kremlin trolls" [141][142][143]).…”