We agree that the recent wait line at Tejon is unusual, and that is exactly why those drivers pictured waiting in line did not anticipate it.
The flaw I see in your proposal is that those drivers photographed waiting in a line to charge at Tejon did not know in advance that all the chargers were in use and that other cars were waiting. That is a very unusual situation at Tejon, as you pointed out in your post.
As has been discussed many times before on TMC, Tesla has real time information as to how many cars are charging at an SC, their state of charge and how long it will be before they have enough charge to proceed, and even how many other Teslas are parked very close to the SC but not charging and the state of charge of those cars and how long they will need to charge before they can proceed, as well as other cars headed toward Tejon because it lies along the route in their nav.
Using all that information, Tesla could inform all Teslas within hundreds of miles from Tejon that have a nav route set for Tejon as to the level of activity at Tejon and offer alternate routes that avoid Tejon or inform drivers the option of slowing down so they could avoid Tejon altogether (when Buttonwillow SC comes online that will certainly be a feasible alternative, but as of now it isn't for most cars headed for north for a charge at Tejon).
I could go on and on describing how such a system would work, but you get the idea. I am confident that Tesla has such a system on their "to do" list but have no idea when it will actually be implemented. Surely it is doable, and is a fairly complex problem, but it is a solvable one.
Most respectfully, when something like "The Wait" may be ahead, it is sometimes good to have a fully implemented Plan B.
So when you arrive at a Supercharger (in an S85), and it has a long line, if you have driven using Plan B, you now have Options.
You can still wait if there is only a short line, or calmly proceed to the next Supercharger, because you can still have adequate range to make it there.
Will you always know if there is going to be a line and a wait at a Supercharger?
No.
Can you do something about it should there be a line?
Absolutely.
If you have driven using Plan A, the only Option one has is to get in the queue and wait your turn to charge.
Because you have already expended most of the range of your battery.
Maybe ONE HOUR AND 45 MINUTES, if not more.
And Old saying: "You can spend your dollar anyway you wish, but you can only spend it once."
The same is true for range in a battery, once the charge has been greatly reduced, only way to get it back is to recharge, or go down a very long hill and get some regen.
And I would hazard to guess that very few drivers ever consider using Plan B.
TM currently has a lot of oars in the water, all rowing like mad.
TM
might also start using the same "power" to limit who can charge for free at certain locations if they sense/know the Supercharger service is being abused by locals.
As the saying goes: "Be careful with what you ask for, because you may get it."
Knowledge is Power.
Using Knowledge is Genius.
The other interesting tidbit is drivers always expecting to have "another" Supercharger added/built to cover a small gap, in this case Buttonwillow.
The cards are what the cards are.
Simply put, Play the hand you currently have, and quit your grousing.