Antisocial sabotage
This is unfortunately what has always happened: The work stoppage is announced by the union suddenly, so that the courts do not have time to rule on its legality.
In this way, just one union managed to close the Athens metro, punishing thousands of passengers who are trying to get their lives back on an even keel.
Any bodies, political or unionist, that support these practices are complicit in antisocial sabotage.