>Dragan, thanks for your detailed reply.
>
>After posting this, I continued thinking about it, and am now quite sure that it is, indeed, a pyramid scheme.
>
>The part that worries me most is that there seem to be several companies (or individuals?) involved, all of them posting large amount of signs all over the city.
>
>I think I am going to gather support for a vampire-hunt. (A vampire is a legendary creature that sucks your blood. If it bytes you, you will become one of them.)

An ethnology study 30 years ago revealed that Serbian peasants don't believe in vampires anymore. Or rather, they believe vampires existed, but the people don't get to become vampires because they were perforated while alive, so the vampire leaves in time, before death, and then it is not dangerous. The perforations they meant were the vaccines :).