I heard before this event (in early April), that there was a 24/7 2-can rule in force at Stn or Gp level, for all off-duty personnel in support of ops in Libya (deployed or not). I suspect this would be an unpopular order.
Putting 2 and 2 and 2 together, it seems as if this order was breached (as is inevitable) and that two officers were caught (unlucky for them, but they must face and accept the consequences) and that the subsequent 'dry' order (which smacks of collective punishment) has prompted the leaking of this dog-bites-man story.
Most of us who have served have drunk enthusiastically to excess, usually knowing when to rein it in, occasionally failing in this regard, but always accepting the consequences for our social actions. Very unlikely that this alleged incident would have any implications for flight safety or operational effectiveness, other than flouting a 2-can rule or risking being caught out if the sh!t really hit the fan in some unlikely way, but orders are orders and all that.