Well, we have already used 400 megs today and no one has downloaded anything, just my mum has browsed the web a bit, maybe 5 megs or less we should have used, and my mum said it was going slow this morning, like someone was downloading. I am starting to think some ass hole really is using our internet, but I have no way to check. It doesn't show on the modem as they aren't accessing through the modem, it is through airport. I put a password on airport but my iPod didn't ask for it so obviously they would still be able to get on. Is there any way I can stop people from accessing it?