You are plenty as stupid as me, for your suggestions of someone not taking care of themself adequately (as you are not their doctor and are advising something that no diabetic should ever do), and you didn't bother to read the rest of the thread, because I have already provided you with the fact that I am a type 1 diabetic. Put on your thinking cap, use it, and then get back to the boards, and don't post worthless ******** that could get someone hurt. If you want to injure yourself, go for it--it may actually help in your case. Don't ever come on here and advise people to do something that is dangerous to them though.
As I said, if you would have read the previous statements, you would know that I am type 1, and have been for over 20 years now. I would also point to the fact that A1c, while a good way to predict your overall health status, is not THE determining factor in your care of your diabetes. Allowing your bloodsugar to reach any higher than normal will drastically reduce your ability to perform at anything--hence the reason it is dangerous in so many ways. This is, and has been, a well known and researched fact for quite some time now.
Second of all, on your "hypothesis" about pros using insulin for performance benefits--how will that make their blood sugar higher? The body of a person without diabetes will produce its own insulin and regulate its own blood sugar, regardless of whether or not you give it extra insulin. Adding insulin to this equation will cause the blood sugar to go even lower than it normally should. In this case, the body will be readily looking for any available energy source, and will use up what it finds very quickly--fat, muscle and any form of simple sugar (gels, energy drinks, etc), and allow for an energy boost. This is very contrary to the information you post, where you recomend that you allow your blood sugar to get extremely high (keep in mind "normal" is 80-120, and you are recomending allowing it to reach 300?????), and then adding sugar to that by consuming gels or an energy drink. While your A1c may point to you being healthy, this behavior is extremely unhealthy, and you should know that if you have had diabetes for 15 or more years. There has been evidence over the past several years stating that allowing the blood sugar to move drastically up and down is what tends to cause most of the problems diabetics experience--hence the push in using insulin pumps for treating this disease best. Keeping the blood sugar from spiking, in either direction, is an important part of overall health with diabetes, HbA1c does not take blood sugar spiking into account at all.