I dare say the model SSPX seminarian and priest have already been defined and are a far cry from those that turned their backs on the mainstream in the early days. The current crop though have undertaken their training at a time when regularisation was on the cards and it is a bit late in the day for members to start questioning the Society's changed mission. New entrants will now of course be very Rome-friendly and will be checked out for signs of rebelliousness.
As Australia was memntioned here, I wonder how priests like Fr. Black now handle the internal changes. I remember being lectured on Fɾҽҽmαsσɳɾყ, the enemies of the Church, etc., etc., etc. when he ran England. I expect that sort of thing has been severely toned down if not deleted from the script.