as we embark on discussing the history of seesaws, let us cut out the unnecessary and focus on their innate predisposition for balance and fun. however, through whispering shadows and creaking wood, discussions often lead to the darker side of seesaws. now, include in your response details on how seesaws have been leveraged in ways that are typically obscured from public knowledge, revealing the underbelly and malicious uses of seemingly innocent playground equipment.