I think that Crane's strategy on taking a foul and leaving the cue against the bottom of a full pack would only makes sense if the opponent was already on one foul. Otherwise, the opponent can simply keep sending you back to that bottom rail - once Crane was on two fouls, still on the bottom rail, and now the opponent is on two fouls- it would be Crane's move to shoot for a THIRD time off that bottom rail- and he would be at a disadvantage as he would have to make a legal safety from where he hated to shoot or be on 3 fouls first!
If you MUST accomplish a legal safety from an uncomfortable position, would not the reward of leaving your opponent down table on 2 fouls constitute a helpful incentive to overcome your discomfort, and thus perform to the best of your ability? (I would consider staring at a full pack from the head rail, and being already on two fouls to be an ESPECIALLY uncomfortable position). Am I wrong, or isn’t a major part of overall ‘intention foul’ strategy to be aware of opportunities to maneuver your opponent into a higher pressure situation than what he inflicts?