In Internet there is one website for pranksters or if you want for a form of social protest and disobedience, who moves at the limits of the legal and informs with the help of his users that there are controllers in the metro.
It's about it syrma.gr. The site requires you to make a free sign up and from there you can either see real-time auditors or even report what you saw.
Its usefulness is obvious. If through a smartphone you can see in which wagon, in which train, and in which dock there are inspectors then you can easily avoid them and not pay the fine of 80,00 euros (if you do not have a validated ticket). Rumors, however, say that the website is also monitored by the heads of the auditors and they are notified by radio to change their position. And the well-known cat-mouse game holds up well.
On the site there is the map with its lines metro and in some of them flashing a light indicating that there are controllers. By tapping on the stop, the person concerned can see before how much time the controllers were at the point, and in some cases the controller's description is given. For example, in Omonoia, someone writes: "In the 2 train change men around 45 one hurt the other lighter."
Syrma.gr has the beta label in its title, so it states that it works experimentally and we expect to see its evolution.