Im not an expert with this kind of thing by any means but isn't there a chance that it could cause damage to more advanced devices? anyone have any ideas how they get around that?

i had the same thing happen to me when i was 15. I explained the security flaw, but they didn't understand a word i was saying. I ended up being suspended for three days and they deleted my login. Naturaly being 15 i wasn't to happy and used an apple computer to create an admin account. i spent the rest of my last year at the jr high (freshman are at the jr high at the school i went to) making the IT guy's (just some old guy who didn't know much about modern security) life a living hell.