I used to encourage my son to do this for the same reasons MRGRAPPLER noted. It's seemed like a waste of time to go to a tournament and mow through everyone quickly. That said; I don't let my son do it anymore. There isn't any quality mat time by taking a kid down and letting him up 6 times before you finish him. In the end it humiliates the opponent, pisses off the refs and just isn't a good look. I think there is more dignity in finishing off a lesser opponent quickly than making him look bad in front of his family and friends. I'm not going to judge anyone for doing it but I can't, in good conscience, justify this practice for more mat time. Spend more time at practice if you want mat time or go to tougher tournaments.