Hi Interesting post! I checked my router and the following Security options are available: None, WEP, 802.1X, WPA-PSK, WPA
I am not a Security expert, however I understand that all of them would have vunerablities in them. Whichever security protocol you might want to implement, it is just a matter of time before an exploit is found.
In India we have a saying "Locks are to stop a honest man from being a thief. A lock would not stop a thief. Thief would be able to crack the lock anyway"
I figure that ISP's would not be able to do much about the security aspect of wireless access points.