Right, unless your site is on the HSTS list AND all your users are using Chrome or firefox....
Which was basically my original point, which is that if you want your site to be generally accessible by just typing in the domain name, you still can't just turn off port 80...
Which I guess is why google.com itself is still reachable on port 80.
http://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security