Hi,
i saw your post earlier and was hoping someone would comment with good advice.
It's very hard to explain how exactly you feel during a hypo, i have been agressive a few times, but only shouting and to be honest i really didn't realise i was doing it and i couldn't explain why i did it either, which was frustrating for me because i couldn't come up with a valid reason to the person i'd shouted at because just saying 'it was because my BG's were too low' made me feel like i was blaming it on diabetes.
I know you are trying hard to stop these hypo's but some are going to be enevitable, the lower you go when hypo will probably have an effect on if you becom aggressive or not. If you find Dylan is recognising hypo's lower and lower which result in aggressive behaviour it might be a good idea to think about letting his BG's run slightly higher to bring that hypo awareness back up so he is able to recognise them before he becomes aggressive.
It must be frustrating to Dylan to feel like this when he's hypo, it must be difficult for you as you know it wasnt completely his fault, but you also need to make sure he is responsible for his behaviour, hypo or not.
He needs to learn how to better control his emotions, encourage him to walk away from situations that may aggrevate him if he happens to be likely to hypo.
it really is difficult to know how to properly advise as you sometimes can't help what happens when your hypo, as sometimes it's like it's not you doing silly things, like i once made a full blown fancy sandwich when i knew i needed hypo treatment. I even had to go past the orange juice to get the bread!!
In no way do i mean to assume that you hadn't already but i hope Dylan apologised to the boy and it was explained that he was hypo at the time.
Maybe it's a good idea to monitor his BG's even closer near times he could hypo, such as football training and matches etc. Try and catch those hypo's before they get too low.
Hope some of this helps a little and maybe even prompts some responses