Presumably she's adult onset diabetes, not Type 1 (juvenile, the more serious version that requires shots...which, incidentally, is what I have), so her problem is probably caused by obesity. Hence, I imagine she could stand to go on a hunger strike without causing too much trouble--her doctors might even approve of the measure.
Perhaps she'll lose a ton of weight and market this as a new diet? Call it the "Border Protest Diet."
I may be wrong on my post re: her diabetes, I don't know. I don't really know about adult onset diabetes---
I just know about Type 1 diabetes, which DOES require carbohydrates or the person would go into coma....
Sorry if I misrepresented what this person may be doing to herself---
NO, you can't go on a hunger strike without trouble. My blood sugar went down to 43 once and I had to be taken to the hospital by ambulance. I was incoherent and it took quite a while to get my blood sugars up again. It's no joke.