There isn't anything that you could really do. The users are actual registered Twitch users that are being controlled by code meaning that DeepBot cannot know if they are real or not. You could ban all the bot accounts, but who ever has made them could just make more. Have you tried changing the command from !ticket to something else? If it is hard coded to pick up the specific message, then changing the command will throw the bot off and maybe stop it until the person updates the code.