Lil Wayne security viciously attacked a fan who mocked Weezy with his iPhone .... and it was all caught on video.
Wayne was scheduled to show up at midnight on Saturday to play a show at Revolution Live in Fort Lauderdale, FL ... but the crowd became agitated when Wayne didn't get there until 3:30 AM.
According to people at the show, one fan used his iPhone to show off a scrolling message to the stage. Before Weezy arrived, the message said "Shut the f*** up and put on Weezy" ... but later it just read "F*** Weezy."
Wayne was spotted by the New Times Broward-Palm Beach pointing out the fan and sending one of his security people to deal with him.