I'm not there anymore, but it has been stated on this forum, that a SKF call will result in an automatic CDT test. If this is true ( and it would not surprise me) a fatigue call could result in the person being shown the door quick smart.
If that is company induced pressure not to call fatigued, I dont know what is.
And let me add, I think 99 percent of people would not be bothered by a CDT test, but it's just yet, another threat from the top.