So now you're telling me we're idiots for assuming you didnt do it because you could have been hacked, your wifi could have been cracked or your mother did the attack. Well first off your mother sounded nice on the phone so I don't think she could have done it.
If your systems are indeed hacked/infected with trojans don't you think the logical thing to do is log offline, separate your machines off the Internet and begin auditing your system for infection? Perhaps even being helpful and providing the trojan itself that you are infected by? And what are the odds that someone is going to log into the exchange as you to check on your coin balances, then exploit a hole in the system at the same time? And what are the odds that someone would hack your piece of shit computer, on your piece of shit slow connection to commit this hack and frame you? You must be special. Or hated.
If your wifi was cracked, then perhaps don't you think that instead of being smug and calling people idiots perhaps you should log into your router and look into your authentication logs to see if anyone has logged into your router? Maybe even producing screen shots and MAC logs of the actual incident?
Another thing you're not taking into account here is that the UserAgent/IP that attacked the site, matches the same logs of every single time you logged into the exchange? So, let me guess - someone infected you with a trojan, installed and configured RemoteDesktop and used your system and your slow connection to break into the site while you were checking your coin balances? And you do not notice this?
Your arguments are simply bad. And instead of being stubborn and holding onto stolen BTC you should return them. You may even get a nice reward in cash for it. So I guess you need to really evaluate who the real idiot here is.