I know an irresponsible Type 1 too. She's not even 30 yet, is overweight (but not obese) and doesn't manage her diabetes properly. She doesn't have a glucometer, and just administers insulin based on how she "feels". Instead of avoiding sugar or carbs, she just administers more insulin, because "I'll have to give myself insulin anyways." She is starting to have problems with her vision, I wouldn't be surprised if she's blind by the time she's 35. So irresponsible.