If you notice that the playground equipment is not safe, or the authorities are neglecting safety norms, it is your prerogative as a vigilant father to bring this to notice of the people concerned.
Promptly report any faulty equipment or hazard that a park might have to the authority in charge of the playground. If your playground is on city land, call the parks and recreation or related department. At a school, report to the principal or superintendent. Organizing a community to improve a local playground might also help. Be wary of any potential risk your child might face at his playtime. If the problems persist, move to a safer playground.