I'm not defending poor quality code. I'm looking for a way to avoid someone being insulted because they've written bad code. That's all. Do you ridicule or insu

I'm not defending poor quality code. I'm looking for a way to avoid someone being insulted because they've written bad code. That's all. Do you ridicule or insult your current colleagues because they have written bad code? If you don't, why would you do it for the people who were on the project before you?