As a Type 1 diabetic, I can say that is a load of crap. Even missing insulin injections for one or two days is NOT going to cause major issues. Though I never take precautions when travelling for only one day, which sometimes has become two days due to delays and problems, I have never been hospitalised or had any major dramas due to hyperglycemia. Since travelling usually involves lots of sitting, hypoglycemia is never an issue if I am eating regular meals.
Sorry for being OT.
No need to apologise and thanks for your input.