In the wake of numerous complains abt refereeing quality for MMU league games. I had to personally agreed on the lack of quality in terms of their control of the game. Witnessing what happened during yesterday's game (
HERE), a lot of bad decisions has been done resulting players to revolt and almost started a fist-fighting frenzy against each other.
It is fully understandable that everyone will backup their own team and will not tolerate against the opposition thus it is utterly most important for the refs to bring the tensions down by officiating the necessary action.
If I recalled correctly..a lot of fouls has not been treated correctly and misscommunication between referee and his assistants happened very frequent.
By refering to below guide, I would say a lot of these rules were not applied properly during yesterday's game.

Direct free kick offenses
A player commits a foul by tripping an opponent A direct free kick offense occurs when a player commits any of the following in a manner considered by the referee to be careless, reckless or using excessive force:
- Kicking or attempting to kick an opponent
- Tripping or attempting to trip an opponent
- Jumping at an opponent
- Charging an opponent
- Striking or attempting to strike an opponent
- Pushing an opponent
- Tackling an opponent
Or commits (one of) the following offenses:
- Holding an opponent
- Spitting at an opponent
- Handling the ball deliberately (except for the goalkeeper within his own penalty area).
Handling the ball is deemed to be deliberate if the referee believes that the player attempted to control the ball with the hand or any part of the arm ("hand-to-ball"). If the ball strikes the hand or arm of a player inadvertently then it is not deemed an offense ("ball-to-hand").
If a direct free kick offense occurs within a team's own penalty area it becomes punishable by a penalty kick, irrespective of the position of the ball, provided the ball was in play.
[edit] Indirect free kick offenses
Fouls punishable by an indirect free kick are:
- When a goalkeeper, inside his own penalty area:
- takes more than six seconds while controlling the ball with his hands before releasing it from his possession
- touches the ball again with his hands after it has been released from his possession and has not touched any other player
- touches the ball with his hands after it has been deliberately kicked to him by a team-mate
- touches the ball with his hands after he has received it directly from a throw-in by a team-mate
- When any player in the opinion of the referee:
- plays in a dangerous manner
- impedes the progress of an opponent
- prevents the goalkeeper from releasing the ball from his hands
- commits any other offense, not previously mentioned in Law 12, for which play is stopped to caution or dismiss a player.
[edit] Advantage
According to Law 5 of the Laws, the referee should allow play to continue when the team against which an offense has been committed will benefit from such an advantage. The referee indicates this by calling "advantage" and extending both arms in front of his body.
This means that a foul will not be called if the referee feels that letting play continue is more advantageous to the fouled team than stopping play for a free kick. However, if the anticipated advantage does not ensue at that time, the referee may then stop play and penalize the original offense.
* Above article was taken from http://en.wikipedia.org/wiki/Foul_(association_football) and
http://en.wikipedia.org/wiki/Referee_(association_football)