What load of BS!!! Any decent referee is not swayed by what the coach and especially what the spectators/parents are yelling. Any good referee will listen to the players and may make adjustments to how the game is being called. Referees do not give "make up" calls. That statement is just about as ignorant as yelling at the referee that they are not calling the same number of fouls on both teams.
A lot more goes into actually calling a foul than you may realize. When a referee sees a foul there are several split second decisions that are factored in before the whistle is blown, such as the severity of the foul, if the player can play through the foul, is there a teammate that may get the ball and continue the attack, was the foul a tactical foul, position on the field, is this player being targeted, does a card need to be issued, etc.......