In that it's undesirable behaviour, yes. Certainly the messaging could be a lot clearer. But the fact that multiple office suites do the same thing... one coul

In that it's undesirable behaviour, yes. Certainly the messaging could be a lot clearer. But the fact that multiple office suites do the same thing... one could argue that there are good reasons for allowing formulae in CSV files. So I would argue that the "bug" is never going to be fixed, and that the real fix has to be our attitudes. We need to start treating CSVs the same way as we treat HTML - sanitise any user-provided strings strongly, quote all fields, etc.