Looks like he is trolling you, but he can't get your ip or any personal information from playing this game. So as long as you don't go to links or anything you don't know/trust you will be fine. If he types any ip loggers/phishing links you can report him for it. Also using things like a VPN when on the internet is very helpful. You can ignore list him in-game if you don't want to read what he says anymore.