Depends on the setup of the Discord server. Many servers have different "roles" created, though often they're just nothing more than a title and a different co

Depends on the setup of the Discord server. Many servers have different "roles" created, though often they're just nothing more than a title and a different color for your name when chatting on the server. If you don't have the default role on your server, then anybody would probably notice the fake person is a fake because they'd have the default role color. Second, servers can require that your account have a verified phone number for you to join or chat on it, which raises the barrier a bit for creating fake accounts. Finally, even if they join a mutual server and send you a private message, when you view the message, you won't see the private message history of the conversation with the real account, giving away that it's at the very least a new account. Overall, it's harder to impersonate on Discord than it is on AIM, but still certainly not impossible.