[oavdeev]

Exact same photo was making rounds in Russian Facebook few weeks ago, judging by the door and the handle I bet it is indeed Moscow, not London.

As in this case, no one saw the guy actually skimming cards. Also if he was doing really that, why not hide POS in a bag or his pocket?

[at-fates-hands]

This was my reaction.

If you're skimming cards, you probably want to make sure your target is unaware of what you're doing less someone sees you and notifies transit cops or some other authorities and you get arrested.