sure. Suppose you have someone who starts fights, is a known drug dealer, acts like a fool on the stage, does something inappropriate, or just portrays a bad image.
Could a promoter turn down a guy with neo-nazi tattoos all over his body? Or course.
Could a promoter turn down a guy for being a public spectable, bragging about cutting Ben1's brake lines, causing drama at events, etc? SURE! The sponsors could say they don't want that kind of riff raff on their stage, distracting an otherwise quality event.
Look at it this way. Vince planned to bail out on the event again anyway. All this does is give him an excuse.