By entering 1v1 games and never taking a turn, or take 1 or 2 turns and then get booted or surrender for no reason at all.
don't report these players, getting booted or surrendering is allowed, so no point in reporting them. Usually there is a very good reason players get booted, and if you don't like to play with player that get booted a lot, use open seat prerequisites
Spying for the other team(s) & pretending to be working for the team you are on. In all actuality, you are actually working for the enemy; you will purposely not work for your team by making bad moves, and write dishonorable replies when you are caught.
If you find a player is doing this, report them immediately. Don't publicly shame them unless they admitted to doing it!
1. teo2. Mushito3. Stech934. morgan975. Federico6. Diyar7. Michele8. Will9. Clara10. 43Kp5d11. Tommaso12. pesco274813. Seby14. Volantis15. Albertino
Player names aren't very useful, if we want to blacklist someone we would need to visit their profile, so link those with the names