Great subject. I would add to say that as (27% all LEED registered ft² is outside the USA) LEED becomes the internationally dominant green building certification program, it should be considered that the habits of countries differ. For example in the UK, almost no one smokes anymore. Tabacco advertising is all but banned. However, in Germany every second person smokes and the practicalities of forcing half of the population of Berlin out into the cold on the streets may seem unrealistic, but their legislation inforces that already. Unfortuanately you can't be 25 ft away from all doors, vents, and operable windows in a built up city where the buildings sit ontop of each other. If all the buildings were LEED certified, you'll always be breaking someones ban.

I was there when the inclosed public space bans came in in the UK and although a lot of people made a big deal of it at the time, they rarely talk about it anymore.

From an energy saving point of view...yes. The amount of energy saved if you had to cancel all those additional extraction fans in the world would really count for something. And world health would improve. Healthcare funded by the tax coming in from selling more extraction fans and tabacco would suffer though.