[1] Řezník uses general horrorcore themes and he has collaborated with many interprets like King Gordy, Bizarre, Lex the Hex Master, Mastamind, Madchild, Necro, Ill Bill, Brotha Lynch Hung, Kung Fu Vampire, Insane Poetry, Twiztid, Sean Strange, Snowgoons, Scum, Razakel, Alla Xul Elu, Donnie Menace, Mr. Hyde, Geno Cultshit, The J. Hexx Project, Heaven, Psych Ward, Gorilla Voltage, members of Butcher's Harem, etc.
On 29 November 2013, Tomáš Klus announced his departure from Český slavík,[5] while Ruppert returned his own award which he received in 2006, accusing the organizers of censorship.
[6] In 2011, Řezník and his colleagues, rappers Pitva (Autopsy) and Hrobka (Tomb) appeared at court, charged with racism and extremism expressed in their song Konečný řešení (Final Solution).
The court also pointed to similar provocative artworks produced i.e. by creators of Monty Python, Happy Tree Friends, or Itchy and Scratchy.
[1] On 30 November 2013, a lawyer of the magazine Týden stated in an interview that Řezník's song Ta holka v mým sklepě (The Girl in My Cellar) contains objectionable passages constituting incitement to discrimination, hostility or violence.