Zlin,
Trytofly is correct. There are two real issues here
1) How the hell does a pilot know if he is breaching the limit? He's told that it is 0.2 or whatever, a very low figure, but how does he determine that? The real 'rule breakers' will know for sure, they went on a bender maybe and broke all the obvious rules. That does not account for most pilots, I believe. This is an issue that the airlines have to address too. Somehow, a pilot needs to know if he 'meets the rules'. At the moment it is haphazard, to say the least. The pilot needs to ascertain if he meets the rules and givemn the 'chance' to make himself 'unavailable for duty'!
2. Short haul pilots. These are the guys most vunerable. Most normal people like a drink and who the hell can deny them that right. But, if you give a pilot the minimum 8 stautory days off in 28, then why shouldn't he be allowed to have a sensible drink during his 'time off'? The new rules would inhibit a guy the chance to even have a sensible, moderated dinner party on a legitimate day off, if he had to report the next day for duty! Again, maybe this is the airlines' problem to solve with the 'rule makers' and maybe you have to grant a 'drying out day' after the 'statutory days off'.
3. The airlines cannot just throw the 'rule book' at the pilots. They need to be proactively involved, so should the unions, such as BALPA.
It's an industry problem, not just a pilot problem. IMHO