How do I block communication from a toxic player in Heroes of the Storm? I found a "blocked players" list under Options → Social, but I don't see any way to add new players to the list.
Blocking works a bit differently depending on whether you are in a game or not.
During a Game
Open the scoreboard with Tab, click the Options icon to the far right of a player's name, and select Block Communication.
While in a Party
Right click a player's avatar and select Block Communication.
While in chat
Right click a player's name or avatar and select Block Communication.