Blizzard has posted a brief note to let Heroes of the Storm players know that a new round of account suspensions has been issued specifically targeting AFKers and other "non-participants". Players who have repeatedly and purposely died throughout cooperative matches have also been suspended. According to devs, "these actions were targeted at players whose in-game performance data, combined with high report volume, clearly shows a consistent lack of contribution".
Developers feel that this type of behavior ruins the experience of others and "undermines the spirit of competition that's essential" to the game.
You can check out the full post on the Heroes of the Storm forum.