Changes

Blackriding is possible, albeit risky. Controllers are very frequent and often wear civil clothes, so they cannot be noticed before the doors are closed. And since they do not receive hourly wage but salary depending on how many people they catch, playing the "dumb tourist" will have no effect on them; they want you in their record. The good news is that even if they ask you to pay the fine on the spot (40 euros), you can say you don't have the money and then you have two weeks to pay it. Or, give them a false address and just never pay it.