Because you will get slapped by a mic.
So, Rihanna was performing who knows where and during one attempt to get ‘close’ to her fans by singing in the crowd she got pulled by a fan to which RiRi responded by slapping the enthusiastic admirer with her mic.
Watch the video and enjoy the glorious sound of the mic hitting the fan’s head.
Fans of divas should for once and always learn to only look and not touch. Duh!