You can just look at the audience that are present whenever WWE has shows and you will know that there is no age limit to watch. There are a lot of kids available who hope to see their idols. There are adults who have always dreamed of watching the WWE live.
They have different favorites and they have different reasons for watching the show. The fact cannot be denied that WWE has become very popular over the past years. It is likely that more and more people would continue watching no matter what their age is. There are some parents who restrict their children from watching live as they feel that the show is a bit too violent for their kids.