help with wireless network

ok the other night i was over at my friends and i pluged in my wireless card into my handheld pc, and i found i had an internet conection! i was like stupid fuckers! leaving there conection unlocked then i tried a default router ip and gues what iwas looking at their router, further more i tried to log in as an admin and of course their name was 'admin' and pass 'password' lmao!! is there anything i can do apart form take advantage of this free internet conection??

The RIGHT thing to do would be to tell them about it. The SMART thing to do would be to change the account passwords you have access to and load some programs into the network.

yeah that would ne the right thing to do but the thing is i dont know who it is he has about 30ish houses arround him