So facebook has launched the next step in their attack on the internet, it's sad that they are succeeding where microsoft failed two decades ago with their attempt to replace the internet with their proprietary microsoft network.
As a rule of thumb, what's good for facebook is bad for everybody else. A transnational corporation whose business is surveillance and data gathering planting devices in local businesses replacing wifi internet access by "you don't get to use the internet if you don't submit to our corporate surveillance" is not good news.
Telling a portion of your customers to go fuck themselves is not good for businesses and this is what such facebook routers are doing.
Replace facebook by NSA here and say again you don't see a problem here.
Filtering what you put on facebook will not protect you and not using it will not prevent facebook from profiling you but will prevent you from accessing "free" internet from this places.
No it's not. It's the same as answering your business phone by saying "go fuck yourself" and hanging up 1 out of 10 times.
Besides it doesn't solve the identification problem at all, as in lent credentials, fake accounts, hacked accounts and things of this ilk. It turns facebook acounts in commodities to be traded to access the internet.
An the worst part is that it's an attack on the very foundations of the Internet.