One study showed that 30 governments worldwide (out of 65 covered by the study) paid keyboard armies to spread propaganda and attack critics. According to the report, these governments use paid commentators, trolls, and bots to harass journalists and erode trust in the media. Attempts were made to influence elections in 18 of the countries covered by the study.
In February 2020, the New York Times interviewed 10 ex-People's Mujahedin of Iran (MEK) members who said that the MEK's Albania camp had a troll farm that promoted the opinions of MEK supporters, including Rudy Giuliani and John Bolton, and attacked the Iranian government. The MEK claimed that the former members were Iranian government spies.
It has been widely suspected that Brazil's president Jair Bolsonaro and his family created troll farms to promote support for his government policies and to attack and harass rivals through the internet. These fake accounts and bots are possibly controlled by an office inside one of Bolsonaro's government buildings led by Jair's son Carlos known as 'gabinete do ódio' (bureau of hatred), which is suspected to have created more than a thousand fake accounts to support Bolsonaro's government.
Troll accounts have also been linked to misinformation related to the COVID-19 pandemic in Brazil, as Bolsonaro's government is known for having adopted a denialist and weak posture regarding the pandemic.
India's ruling party BJP under the leadership of Narendra Modi institutionalized Twitter trolls to support its agenda and attack political rivals. Their methods were recorded by investigative journalist Swati Chaturvedi who also wrote a book on the subject, I Am a Troll: Inside the Secret World of the BJP's Digital Army. 
Finnish investigative journalist Jessika Aro interviewed workers at a “troll factory” in Saint Petersburg. Aro was harassed online after she published her story. A court in Helsinki convicted three persons who had harassed Aro on charges of defamation and negligence.
Aro has stated that online trolls can negatively affect freedom of speech and democracy.
In 2020, during the COVID-19 pandemic, Facebook found that troll farms from North Macedonia and the Philippines pushed coronavirus disinformation. The publisher, which used content from these farms, was banned.
The Philippines has been called "patient zero in the global disinformation epidemic." Studies into the country's troll farms found that political campaigns pay trolls $1,000 to $2,000 per month to create multiple fake social media accounts to post political propaganda and attack critics. The political campaign of President Rodrigo Duterte has spent $200,000 to hire online trolls, according to one study. Duterte admitted to hiring trolls for his 2016 political campaign.
The Russian web brigades, including Internet Research Agency, became known in the late 2010s for the Russian interference in the 2016 United States elections. The Internet Research Agency has employed troll armies to spread propaganda, command Twitter trends, and sow fear and erode trust in American political and media institutions.
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