https://www.mercurynews.com/2022/03/28/live-updates-germany-may-prosecute-use-of-pro-russia-z/

BERLIN — German authorities are considering whether to prosecute people who use the “Z” symbol to show support for Russia’s attack on Ukraine.

Russian troops in Ukraine have painted the letter Z on the side of vehicles and it has been adopted by some in Russia as a symbol of support for what the Kremlin describes as a “special military operation” in the neighboring country.