click to connect and have all your passwords fly around in plain text, or encrypt and authenticate?
btw, if the wifi is open, its free for all to use, has not been broken into (imho on the services theft). would you sue your friend staying over for using the net link? dont think so, but serious and security aware ISPs do provide you with the wireless modem preconfigured with a wpa2 security enabled and if you do a hard reset, it gets back to factory defaults. the only thing to take care of is to change the default user/administaror password and disable modem wireless administration

check the mac logs from time to time as well