What about an exposure of 'legal' rosters but lacking common sense.
e.g. A block of 5 earlies that require you to wake up at 03.30, leave home at 04.15, drive to crew carpark, wait for bus to terminal, trudge through security to arrive for check in at 05.30. Maybe not too bad if in summer and flying to warm sunny climes. Now transpose that to winter and flying to icy Scandanvia where the airport is not yet open when you depart into a guesstimate of weather conditions for arrival; but with hopefully enough fuel to divert to a major airfield if your destination runway is not yet prepared and suitable. Now do that twice a day for 4 days. Then, when you are at a low ebb, throw in a Canary island (12 hours) out/back to really finish you off. Month in month out. All legal. And if you become tired it is your own fault.