Wasn't this being picked up by Surface Movement Radar? Or better said:
At SPL they use SMR, when is it being used and does it provide warnings in situations like this?
And does KLM often do intersection takeoff on the 737?
On bigger aircraft you're used to crosscheck the numbers since you're anyway mostly taking full length. If you often use intersections, this technique might slowly slip out.
And re: KLM crew: they are just as professional as most of us I think; bad apples in any company.