You better believe it !
I know it firsthand from a australien co-pilot (who now is retired) and a french captain and his co-pilot who refused to fly with him. And yes, it’s true, no consequences from the office for neither of them.
Hmm, I think I know the story but that was *not* with KLM Cityhopper but on the B73 with KLM. There 's more to this story *), but it would be inappropriate to post it here. I only know one French captain inside KLM and he prefers to speak English...
added:
*) For the sake of completeness, the poor co-pilot is not to blame for what happened.