I really don't think so. My uncle went to one of the practice events where they are testing out the venues and the staff and they were so strict on what you could and couldn't take in. Like no branded clothing due to sponsorship, they go through every bag and don't let you take food in etc... it's crazy. So I think anything like the vuvuzela they will confiscate. A shame though as I loved that sound when I was watching the world cup last year!