I personally believe that the whole 'bottled water' thing is one of the biggest scams run on consumers in the last couple of decades. Bottled water is often more expensive than petrol (a liquid with a vastly more complex refining and distribution process). Surely there's something a little strange about this?
Conversations with with someone I knew from Thames Water stopped me from worrying about rusty pipes, and London plumbing is far worse than what I've seen in most other countries. Bacteria? We've been living with bacteria ever since we evolved- without them, we'd be all dead.
Anyway- I should stop ranting and get back to the original point. I think the name and shame idea is a good one- I certainly wouldn't knowingly eat at a place that tried to force me to buy bottled water. Fortuately, it's not something that I've yet come across.