Why so negative ?
This is excellent news. I've had a FON router for a year or so, and no-one's used it yet. It should give me free access to wifi elsewhere, but there aren't many in the areas where I need them : I'd have to go and sit in the car outside someone's house.
BT joining the scheme looked like a big improvement (they share FON access on home hubs but not the paid-for hubs) since it provides a much larger user base .. but hardly any homehubs have it enabled. Opting out rather than opting in is a much more sensible way to do it.
And what's the catch ? You lose a bit of bandwidth. For most residential users, you don't even lose that. In my experience it's the servers and caches that are slow, not the local link. You can always turn it off. In return, you get free access anywhere that someone else contributes.
Security ? Privacy ? I thought we didn't have those any more. If you care, it's easy enough to put the router in the DMZ.
Paytards, all of you. Share and benefit.