At the risk of diverging (slightly.....), I have been reading with interest what has been going on CX and the CAD (one in the same?) with regards to FDTL's. The dollar screams louder than safety, regrettably, and yet again.
However, my point is from experience of pilots ranting and raving over FDTL's yet catching a red-eye from a long weekend away to get to duty on time and then complaining of fatigue when min rest is prescribed for the tour of duty. Or, having that big night out, still clean as a whistle to report for duty of course, yet the "effects" on a previous day's sore head linger..... Now, I AM DEFINITELY not one to talk on some of these issues. The older I get the worse the effects.
I am a firm believer that what we do in our spare time is ours and ours alone.
What the HK CAD seem to be doing, with perhaps (!!) collusion and unfair influence from the CX bean-counters is wrong. While such issues reduce safety, so too does some pilots' lifestyle choices just prior to a draining duty. With these changes arriving such issues will only make things worse.
Just an opinion.