What level of bug would it take for you to believe that a company is inept and bug reporting to be a waste of time?

For example if I was selling lemonade, you bought some and when you tried to drink it, you discovered sand instead of lemonade, would you come back to my lemonade stand and report a bug in my lemonade making abilities?

By the way, no refunds, you keep the sand. Legit lemonade business right?