You don´t need to make up fake reviews, but you can manage the bad one´s and promote the good one´s.

 When the late Theodore Roosevelt came back from Africa, just after he left the White House in 1909, he made his first public appearance at Madison Square Garden. Before he would agree to make the appearance, he carefully arranged for nearly one thousand paid applauders to be scattered throughout the audience to applaud his entrance on the platform. For more than 15 minutes, these paid hand-clappers made the place ring with their enthusiasm. The other sheep took up the suggestion and joined in for another quarter hour.

The newspaper men present were literally swept off their feet by the tremendous ovation given the American hero, and his name was emblazoned across the headlines of the newspapers in letters two inches high. Splendid! Teddy understood and made intelligent use of personal promotion. That was the major reason why he was a great statesman! (From the book - How To Sell Your Way Through Life)

Reputation management is a great way of administrating your bad reviews and promoting your good reviews;