Such a black-list of a major British carrier, if it does indeed have such, was longer by some 30 names after just one flight back from the Caribbean a few months back.
Two families, comprising 30 individuals, were threatening to kill other pax and crew members. Sounded as though a wedding party returning home were in no mood to let the 'party' end before touching down back in Blighty, much to the annoyance of the other pax who just wanted some shut-eye.
All credit to the crew for defusing a nightmare situation to the extent that a diversion to the Azores was not required. Hope that plod had the welcome wagons waiting airside.