Comment 4 for bug 1431876

I don't think a key should be compulsory, but it needs to be the default. If a user creates an unsecured, shared Internet connection in a busy cafe, it can have unfortunate consequences:

* Nearby people may have clients auto-joining open networks, thus using the shared hotspot without even knowing it. This will create additional costs for the user.
* Malicious individuals can use the unsecured hotspot to do illegal activities. This will at worst incriminate the user.

I am sure there are more examples of why an unsecured shared wireless network is a bad idea.