Cruel trick: concrete-filled soccer balls

Mark Frauenfelder:
Two men were arrested in Berlin on suspicion of filling soccer balls with concrete and then placing them in public areas with signs encouraging people to kick the balls.

KickmePolice said they had identified a 26-year-old and a 29-year-old and had found a workshop in their apartment where they made the balls. The two are accused of causing serious physical injury, dangerous obstruction of traffic and causing injury through negligence, police said.

Link
(Thanks for the graphic, Tim!)

maybe the “kick me” part is a bit over the top, but I the idea of random concrete footballs on the streets.