Some countries have blocked Roblox. The game itself is not harmful, but the in-app chat can be extremely inappropriate for younger players. There are also private rooms that are graphic in nature. Roblox actively works to take down this type of content, and it’s likely you won’t stumble across it randomly in the game, but that’s how it is now. In our experience, Roblox used to have much less monitoring, and it was easier for children to stumble across sexually explicit or violent content.  Since VPNs are legal in most countries, an adult with a subscription should be able to play with no problem. Check local laws, however, before downloading.