At Center Grove our youngest contact league is for 2nd graders but 1st graders are accepted if the parents prefer. Much of the fears posted above are unwarranted IF the league is properly run. The coaches, league officials, and referees need to be properly instructed and supervised and the equipment needs to be high quality. If you have those things in place you should have minimal problems. You will not have zero injuries. They happen.
Yes, we should be worried about AAU type football teams and tournaments. I see rogue teams being formed and seeking players and my biggest concern is who the coaches are and what do they know. National championships for 8 year-olds is ridiculous. There is a team forming. now that is talking about playing January tournaments. That's a horrible idea. Play football during football season.
I recently saw that our Jr. Trojans were ranked in the top 20 nationally for 11U. Seriously? Who does this kind of stuff? Do they honestly think their rankings are credible? Usually there are adults trying to profit from over-zealous parents but they've never approached us for anything.