ElectroBSD

"The Electro Beer Software Distribution (ElectroBSD) is an experimental operating system designed to be used in hostile environments like Germany.

ElectroBSD is (supposed to be) free software but due to unresolved license issues it is currently only released as patchset against the non-free uptream.

Electro beer is a dual-use technology commonly used to resist threats like the computer police (Computerbullen). It's also used by the computer police itself (to wash down transistor doughnuts).

ElectroBSD is based on FreeBSD but compiled with KERNCONF=ELECTRO_BEER (alcohol-free as in no alcohol) and a couple of customizations. The goal is to make free penetration tests from the computer police
a pleasant experience for the whole familyslightly less annoying for the test subjects and more expensive for the police (ElectroBSD experts unfortunately aren't cheap)."

https://www.fabiankeil.de/gehacktes/electrobsd/

https://archive.fosdem.org/2016/schedule/event/electrobsd/