GitHub is owned by Microsoft. What pii is involved in this? There's an email address that need not apparently be your normal address. A throwaway GitHub works

GitHub is owned by Microsoft. What pii is involved in this? There's an email address that need not apparently be your normal address. A throwaway GitHub works fine, does it not? Many, possibly at this point most, institutions use tools like canvas, turnitin, etc. Not to mention Google docs/GAFE, or that many schools have official email provided by either google or Microsoft.