5 links have been added on this idea.
  1. Many premier league managers are opposed to blue cards and timeout penalties, and they might have a point given the current failure of VAR technology.

  2. Professional football leagues have been given the go-ahead to try out sin bins and blue cards to temporarily send players out of the field instead of issuing yellow cards.

  3. Penalty boxes, or sin bins, are popular in many sports and authorities have been considering them for football matches for a while now.