C'mon. Maybe ChargePoint or Blink considers the J1772 adapter that comes with the Model S as "unauthorized" as well. Does that mean Model S owners should cease and desist from using those?
I would venture to guess Tesla did not spin the adapter pins from a lathe. A J1772 socket is pretty standard and available from many suppliers.
As for claim that Chargepoint/Blink might think the Tesla adapter is "unauthorized", even putting aside for the moment that those companies are offering their chargers for *all* EVs, that seems to be completely false.
When Chargepoint did charging station demonstrations at their headquarters, they specifically had a Tesla on hand (likely a Roadster given the date in 2011):
"A charging demonstration of six EVs at three dual-outlet stations included a Chevrolet Volt, Nissan LEAF,
Tesla, Zero Motorcycle, Green Vehicles’ Triac, and Zenn EV."
http://www.chargepoint.com/news/2011/0414/
They also did advertising pointing out how easy it was for a Model S to charge at their stations:
"Through the easy signup process, the 50,000th ChargePoint user joined Tuesday evening, and less than one hour later,
plugged-in a Tesla Model S to a ChargePoint station at the County of Marin Civic Center in San Rafael."
http://www.chargepoint.com/news/2013/1115/bay-area-tesla-driver-becomes-50-000th-chargepoint-user/
Blink says explicitly that they support the adapter with their Level 2 stations:
"CarCharging’s
Level II charging stations are compatible with EVs sold in the United States
including the Tesla Model S, Nissan LEAF, Chevy Volt, Mitsubishi i-Miev, Toyota Prius Plug-In, Honda Fit EV, and Toyota Rav4 EV, as well as many others scheduled for release over the next few years"
http://www.blinknetwork.com/about-us.html
In contrast, Tesla has never suggested they wanted a non-Tesla to charge at a HPWC destination charger, but rather installed a separate J1772 EVSE when non-Tesla EVs are expected to charge at a location.