I just came across this old response, so if you're still around, I'll answer it.

No, I'm not confused, and I did not refer to the TSA pre-screen, which is another, although also egregious, matter.

It shouldn't matter if 70% or 7% of the passengers are on Alaska Airlines. Unless I am mistaken, the lines in front of TSA are public areas, not belonging to, nor paid for, by any airline. There should be no discrimination among people waiting in line in public areas. Period. Having Gold, Platinum, Uranium, or Alaskanium status does not give a person particular status in a public area. Or at least it shouldn't. 

Alaska Air can - and does - discriminate at their gate area, which I presume they pay for. Fine. But in public areas, such behavior is nothing more than arrogant hubris, and should be stopped.