Frackal: To answer you questions:
1...Damage to the pancreas is a no brainer. And with the influx of any exogeneous substance/hormone, endogenous production slows down. Now that's bad enough with the HPTA, but at least it's resiliant and supression won't kill you. No pancreas = no life. Not to mention, the more you use, the more likely of developing diabetes -- or in the least, a less effiecient pancreas.
2...The dormant muscle cell theory benefit is a stretch, at best. Benificial to ecomorphs? So is a lot of food. What's ironic is that you hear so much about cutting carbs on these boards. Hell, carbs release insulin! Bulking up with carbs is easy -- but it should be good carbs and most people ignore the best carb of all -- lactose.
3...Sure, less is better than more. But nobody ever died from an OD of testosterone. (The oil will kill you before the hormone does) Why the fuck would you mess around with something so lethal? You're afraid of losing some HAIR??!?! Come on man!
Lots of guys got big without insulin. Only the pros who finish in the top ten need to be bigger than everybody else. Are you in the top ten?
Eat big. Lift big. And yes, roids will help. Insulin is a suckers game. Just my opinion bro. I ain't saying it for any other reason than I hope it keeps somebody from hurting themselves.