Roblox "tries" to be legal, and that's why things like DMCA's can take down titles. However, you can also file counters, should you want.

The law and Roblox don’t exactly have the “best relationship.” That might sound cruel, but it’s true. We’ve talked about lawsuits that the universe has had over the past couple of years ...

The DMCA games are currently unavailable and won't appear in the search interface. Additionally, the IPs used by most anime titles, even if they are similar to the original franchise, aren't ...

Rather than complying, Roblox issued its response on July 21. Firstly noting that the short return period is "especially unreasonable," Roblox's legal team then objected to the broad requests.