Is it fair for an employer to expect 2 weeks notice of an employee?

I am watching people get cut without notice right at Christmas time and can
only imagine the devestation this is causing them, emotionally and
financially. Not to mention occupationally.

Why is it fair for an employer to expect 2 weeks notice from an employee as
well as expect a smooth transfer of knowledge, when all they do is throw
people out the door with no warning?

It seems the best course of action for employees is to protest this inequity
by leaving without notice and no knowledge transfer until employers get the
point that they have no right wrecking people's lives without notice. In
fact, one would think that the fair employment commission of some state
would have some laws in place about the violent and abrupt termination of
employees in good standing.