"The Plastic People of the Universe, " a Czech rock band from the late 60's onwards,inspired by the anti-hippie Frank Zappa and the Mothers of Invention and The Velvet Underground, like the MC5 lived communally and members of the band were imprisoned by the Czech authorities just like John Sinclair. Charter 77, a Czech dissident group of purged Communists, Trotskyists, social and christian democrats, formed partly to pressure for their release.
http://en.wikipedia.org/wiki/Plastic_People_of_the_Universe
>...The consolidated Czech communist government revoked the band's musicians license in 1970. In 1974, thousands of students traveled from Prague to the town of Ceske Budejovice to visit "the Plastics" performance. Stopped brutally by police, they were sent back to Prague in cattle cars, and several students were arrested. The band was forced underground until the Velvet Revolution in 1989. Unable to perform openly, an entire underground cultural movement formed around the band during the 1970s.
In 1976 "the Plastics" were arrested and put on trial by the Communist government to make an example. They were convicted of "Organized Disturbance of the Peace" and sentenced to terms in prison ranging from 8 to 18 months.
Poland in '68 have similiar phenomena?
-- Michael Pugliese