If you have an app filling your database with bad data, do you just take an extra step of writing a tool to correct bad data after the fact? I'd rather fix the

If you have an app filling your database with bad data, do you just take an extra step of writing a tool to correct bad data after the fact? I'd rather fix the app itself so that it isn't sending bad data. "Fixing Foxconn" is taking bad output and correcting it. It's not fixing the app generating bad data.