Changes

Blackriding is possible, albeit risky. Ticket inspectors usually wear uniforms on the SU-Bahn, although on the S-bahn it's possible that there are still some in civil clothing, and since they do not receive an hourly wage but a 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 (EUR 40), you can say you don't have the money and then you have two weeks to pay it. Be careful when giving false addresses, as inspectors can check whether the name and address you give them match. Giving a foreign address is your safest bet here. If a controller catches you, use some identification besides your passport, preferably one that doesn't have your real name on it. That way you're not in the system. First time you also may have a good chance to decrease your fine if you write a letter to the S-Bahn office. It´s wise to mention things like it was an unlucky event, you've been overwhelmed by the city and the mass of people and that you usually pay for the good and ecological public transport... :)