I understand what your saying, but I think this sort of question can only be answered when you examine the reason why these sort of competitions exist. Its kindof like a jr. high science fair, they are created to give the students motivation to persue an area of interest and demonstrate their knowledge. If a kid cheats then congratulations, they can brag for about a week until everyone gets sick of them and they can put that shiny, albeit small, trophy or medal on their mantelpiece and tell their grandkids about it. As long as you dont make the prize anything like money, then cheating wont be that large of a problem. If someone goes to the trouble of cheating by editing video or smoke and mirrors then they deserve it. The real prizes go to those who have gained both in knowledge and experience.