Hope, don't feel shy, this thread is about being honest with ourselves, and letting ourselves and others know, that even know we have done bad things in our lives, that does not mean we haven't learnt from our mistakes. Jon described it so well above, about our past being our past, and that is not who we are now, but we still have it, and hopefully have learnt from it.
When I was also still in grade 8, me and a mate shot up my next door neighbours house and car with our air rifles. Yes, very stupid thing, but then we did not think, nor did we think anyone was home. The wife and little toddler was home, both hiding in the kitchen thinking they where going to get shot. We shot up the side of his car, his power box and put a few slugs into the house. Obviously we knew slugs weren't going to go through the house, because they don't have enough power, only air, but we didn't think much past that at the time.
Once again, we both ended up in the cop shop and I got grounded for a year. It was the only time my dad actually made a grounding stick for me, and man did it stick, till the year date.