QF keep a record of all operating crew and details.
It would be quite easy to Cross reference the flights and see if they are manned by the same persons.
Although at first it may seem obvious that it is a CC, that may not be the case.
Don't forget bolty that a lot of CC are ex engineers and some of the stories they have divulged to us do not make our engineering staff being above certain questionable acts!
lets not get into a slanging match as it serves no purpose!
The individuals involved may be the last people we suspect!
Even though we may have some bad apples amongst us I doubt very much that we could have someone so irresponsible to do that,we spend most of our time apologizing and fixing toilets and equipment not sabotaging it!
The individual or individuals concerned in this act are obviously very sick and need help.........like a boot up the @rse the sack and fined.