I'm thinking they don't give out the addresses until right before the opening because they don't want a bunch of Tesla owners (or worse, anti-Tesla hecklers) pestering the installers. (I know most won't but there's always an exception).
I'm totally with Jerry's observation on this.
Most of the dangers around a working and active construction site are very REAL.
People can get injured, property gets damaged, property and equipment gets stolen (serious problem in the more rural areas with minimal security and police forces).
Sometimes even worse things happen...
Casual observers and onlookers should/would probably NOT be encouraged to be near the construction sites, for Safety, Insurance purposes, OSHA regulations (safety goggles, hard hats, safety footwear, safety vests), general annoyance keeping the General Contractor from doing their scheduled work and maintaining (or accelerating) their Construction Schedule.
(Have you actually COUNTED many new Supercharger Stations have yet to be built by September 21? Then December 21?)
Holy Snipes!
There is a LOT of work still to be accomplished on both the immediate and distant Horizons.
Take this to the Bank: When TM decides it wants to let people know about a NEW ACTIVE and OPEN Supercharger Station, they will let you/us know.
They drew and posted the maps, they are responsible for the infrequent Press Releases, and the degree of secrecy.
Yes, it might be a game of cat and mouse, but in this case the cat knows a lot about the immediate game, and the bigger end game (their vision).
We are just (over)reacting to whatever whiff of Supercharger Scent we detect.
Might as well just relax until then.