Wow, I didn't realise they could do so much damage. I'm sure glad that mine is secured.shadoweater said:They can access any windows shares you may have VERY easily. Then can access your printer if it's shared too. If you have firewalling on your PCs this will be less of a risk but certainly the intruder will be able to use your bandwidth (and if you have it) your usage limit (retards buying capped broadband make me chuckle). They could also very easilhy download child porn and this would flag up against your account so you'll have to explain that. You couldnt say you didnt as your connection is your responsibility. They could also start launching web hack attacks to other systems (e.g. banks) which would also show as originating from your connection.
Attackers can also watch your router for transaction data flowing in and out and can capture this easily if they are already on your local network
Theres a whole load of other stuff too but if you google round you can find good resources on the risks