Under the status quo, if I'm desperate for Internet I make a gut decision on how trustworthy I think the nearest random open network is based on the context of my present situation. If openwireless becomes the default, I might decide that in this random small town coffee shop, openwireless is probably trustworthy and associate with it. I do my business and leave. Then, I could be walking through an airport and pass someone who's set up a malicious base station using the openwireless SSID. My device could associate with it and put me at risk without me even knowing.
Don't rely on SSID for security. Rely on SSL/TLS and certificate pinning.
Now, while I understand this is out of an end user's control, that shouldn't cause us to throw the idea of a shared wireless network out the door. That should cause us to look at non-secure sites accepting credentials, and how to prevent that behavior in the first place.
this site helps with this issue forcing sslany.