Gaining and Staying in Control of a Match (Part 3)
The red and yellow cards are necessary tools that should not be overused.
When a minor situation presents itself, a referee can quickly step in and with a word or a look will be able to change the behavior of a player and prevent further escalation or retaliation.
The repeated use and showing of cards will often give the impression that the referee has lost or was never in control of the match. Displaying cards will not help the weak referee regain control of the match (if he/she even had it in the first place).