I've seen plenty of questions now that ask "Is it legal if...", or similar. I feel as if it would be valuable if Law.SE could be selected as a migration target, similarly to how Crypto.SE can be selected.
It would be nice to have somewhere to ship those questions. But migration isn't only about getting the wrong kind of content off our site, it is also about getting the right kind of content onto the target site.
A lot of the legal questions asked here does not live up to the standards expected at law. They often lack basic details such as what jurisdiction it's in. So I'm not sure they would approve of such a change.
If I see a legal question that is not fit for fight on law, I just vote to close as off topic instead. Sometimes I comment and say something like "if you add more info it might be on topic on law, but be sure to read their guidelines before you post there".