Online troublemakers, also known as trolls, are people who use the internet to spread malicious or disruptive content. They often post inflammatory, offensive, or off-topic messages in online forums and social media platforms with the intention of provoking a reaction from other users. Trolls may also engage in cyberbullying, doxing, and other forms of online harassment. They can be difficult to identify and stop, as they often hide behind anonymous accounts and fake identities.