For those who can read German.. ;_)

[Gryff]

http://www.berlin.de/polizei/presse-fahndung/archiv/43454/index.html

For those who cannot read german some rogues made some footballs out of concrete and put signs next to them saying "Can you kick it?"

Ouch.

[whufc65]

Reads something like

The citizens of Berlin police has that since 30.06.2006 two hurt after footsteps approximately „concrete footballs “registered.
In the citizen of Berlin city, with which emphasis center and Pankow became, altogether six footballs, which were filled with concrete, discovered. The balls were fastened with a link chain to lanterns, trees or railings. In direct proximity of the ball in each case the label stood „for CAN u kick it “with rosafarbener spraying color.

In two cases two 21 stepped - and 23-jährige of men against the balls and hurt themselves easily at the foot.
When finding such balls for notification of the police under the emergency call number 110 or every other police station is asked

Hope this helps