Ignore him/her - If I can't get a sensible response to my point about over cabin crew "back to backs", despite wonker being concerned about "bunching of work", you're not going to get anything meaningful back about Flight Safety.
So sorry it's taken so long to get back to you wiggy as it has taken a while to source some facts regarding back to back flights for cabin crew. One US eastcoast and return flight would generate two days off or MBT's after it. It is far more productive to have the company use those crew to add another eastcoast onto it, this only results in 3 days off or MBT's. So as you can see it displays a higher degree of crew usage, hence increased profitability for the company. The back to back concept was passed as safe by the CAA/FAA and has indeed now been copied by various other airlines operating across the pond.