Roblox is implementing some major changes to the control it gives parents over their children's accounts following damning reports that its platform was rife with child exploitation and abuse.In an email sent to parents who manage children accounts on Roblox, which IGN has obtained and which Bloomberg first reported, the company details that it's finally introducing Roblox accounts with parental privileges. Prior to this, Roblox parental controls allowed parents to essentially set a PIN on a child's account that only the parent would know. This unlocks the ability to change settings like what type of content the child can access and set spending limits.Now, PINs are going away. Instead, parents must create their own separate Roblox accounts and link them to the child account…