No, as long as you can keep your blood sugars within limits.
Define bad?
Every time your BG goes over 140 you are doing damage to your body. it adds up over time, if your 75 yo by the time the damage adds up youle be 90 or so, so what. if your 25 thats a different matter.
As a verry smart guy on another forum said " There is no food I like better than my eye sight"