Interesting set of reactions here, given the implications.
Some have turned this into a ramp worker bashfest, ignoring the fact it will up to those ramp workers to force Ryanair to sign a collective agreement for its flying crews based in CPH. If Ryanair chooses not to, they will not be handled in CPH. If they chose to sign, that will open the floodgates for everyone currently employed by Ryanair, or any other airline on similar terms.
In so many words, pilots and cabin crew have proved unable or unwilling to force collective bargaining on Ryanair, and the battleground will instead be on the ramp, by ramp workers, in CPH. Yet all some of you have done, is taking the opportunity to have a go at these guys, for advising you to follow the rules on running an APU FFS!
The worst enemy of a pilot is not, it would seem, a Michael O'Leary type, but rather pilots themselves.
You should be ashamed of yourself.