This is assuming that you (/police/ISP) can get the [rough] location of a laptop based on IP address.
If your laptop is stolen, and the thief unwittingly connects it to the internet, and you have skype on the laptop could you get the public ip address of the laptop and then go to the police and get it tracked? Or activate the web cam to see the surroundings, but without haveing skype ring/notify the user?