have you ever been inside a football ground? every stadium i've been in usually has a steward the other side of the turnstiles.Can If you actually use the turnstiles?
Because if you did you would know there is nothing on the other side other than a bank of football supporters, and if you are a child they are twice your height with no reference point whatsoever or understanding of what to do next.
The club does have a responsibility to ensure children are safe when they come through that turnstile if their guardian does not follow.