Roblox has faced some safety concerns in the past, but the company has taken steps to address these issues. It has implemented measures to prevent inappropriate behavior and protect children from online predators. Additionally, Roblox has guidelines in place to prevent developers from exploiting young workers. 

As for the credit card issue, Roblox requires users to have a valid payment method on file in order to make in-game purchases. However, it is up to the parents to set limits and monitor their children's spending. It is also important to note that many in-game purchases on Roblox can be made using virtual currency earned through gameplay, rather than real money. 

That being said, it is always important for parents to monitor their children's online activity and educate them about safe practices. They should also familiarize themselves with Roblox's safety features and keep an open line of communication with their children about their online experiences.
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