Instead, what they ought to do is go through the top 10,000 domains and test to make sure that: 1. www.* doesn't end up as a 404 or DNS resolution error 2. ww

Instead, what they ought to do is go through the top 10,000 domains and test to make sure that: 1. www.* doesn't end up as a 404 or DNS resolution error 2. www.example.com matches the content from example.com 3. www.example.com -> example.com is a valid permanent redirect and then finally 4. Publicly shame them. Don't hide it from people because you run into all sorts of UX issues. I really hate www. for a multitude of reasons, but the biggest one is just thinking about the amount of time spent saying it out loud. Nothing aggrivates me more than turning on the radio and hearing "go to our website DOUBLE YEW DOUBLE YEW DOUBLE YEW DOT <some long name like nelsonfurnishingandrepair dot com>". That's like two seconds of air time they could recover.