I say let people make there own decision. If the kids are being watched by a responsible parent... I see no problem with it. It is very simple... The actions of irresponsible parents make this more of an issue than it should be.

If a child gets hurt, the only legal issues should fall solely on the parents of the children... Not a race track. People nowadays think they can blame every problem that exists in there life on someone else... and that's pathetic.