OK here is my question. I have just moved into a flat at university and as soon as i turned my compter on i found several open WiFi Hot Spots.

I have read what Negative said about the the US law and using open WiFi connections but as i am a relatively nice person i would like to help these people out and get them secured more than they are now (the routers still have default user names and passwords). If i can get there IP and machine name am I breaking the law but sending them a message telling them there conenction is open? Is that effectively spamming them?

Cheers for any advice.