It must be on the border line of legality.
I bet it' s totally illegal.
ask passengers what they think about, they will answer:"are you joking?"
captains(TRTI) who train these guys are out of law and should be prosecuted in civil court(or criminal court), why?
because the goal of the line training is to be familiar with the line when released as an FO and not to CASH more money for the employer!!!.
regrettably, we must wait for a crash, then the authorities will start to send some guys to jail, and make the law more precise like they did in the USA.