A question came up recently on Skeptics.se regarding the implementation of "Do Not Pair" lists in Airline operations. I am skeptical of the answer given (irony?) which ascribes the implementation of the Do Not Pair list to the accident on board Northwest Airlink Flight 5719 - an incident which was in part caused by bad CRM.
However, the NTSB report does not suggest any sort of changes to the pairing of Captain/FO's which is what makes me skeptical that anything such as this actually exists within the industry.
Is there any documented evidence that Captains or FO's can in any way affect who they get paired up with? A single example would suffice.