Plies threatens concertgoers

By Mark 'D' ThomasHip Hop Vibe Senior WriterOne would think that Plies learned his lesson after his entourage shot into a live crowd in 2006. Not so, it seems, as Plies threatened his crowd during a recent performance.After the Florida rapper was hit with a cup while performing, he went on an angry tirade, threatening violence."I swear to God, next [person] to throw something up here, I'ma shoot