Yeah, I understand why that would be a concern. For what it's worth, our schemas are completely isolated and never touch any other data. We use them to store our DB functions and custom data types.

The functions are what lets us reflect the latest DB state in the UI in real-time without worrying about schema migrations or adding a bunch of reflection queries to each API call (which would make the UI much less responsive). We just need them installed _somewhere_ in the database.

Our custom data types (e.g. email, URL) are just available for convenience. If you don't have any columns that use those types, then you'll never need to deal with them.