Steam Ban System

As of update beta 24, a ban system was introduced to help counter trolls, alongside steam feature integration and the option for a steam verified game.
The ban system only works in steam verified games, which means you should make sure you trust people when they join.. Games containing players on your ban list are displayed with a red square prefixing the lobby name, and a number corresponding to the number of players in the game. Players can be removed from the ban list via game settings located in Options > Game > Manage bans.

Kicked players are automatically added to the ban list, which is stored in the settings.xml file located in the game directory. The settings file can be edited to contain the steam IDs of players you haven't encountered yet, allowing you to prevent known trouble makers from entering your games in the first place.