He joined a number of radical student societies, through which he met the Japanese communist Hitoshi Yamakawa and the anarchist Ōsugi Sakae.

Pak called for the masses to take direct action against the Japanese state in all its manifestations, including the police, army and even the Emperor himself.

[3] In September 1922, Pak travelled to Keijō (today Seoul), in order to report on an anti-Korean massacre that had taken place in Niigata Prefecture.

In the second issue, Pak published an article in which he criticised Japanese Pan-Asianism, due to the coercive invasion and colonisation of Korea by the Empire of Japan, and disputed the idea of an "Asian race".

[13] Bak wrote an article for the journal's fourth issue, in which he distinguished between the concepts of politics and power, using the rise of the Bolsheviks to a "new privileged class" as an example.

[16] Following the 1923 Great Kantō earthquake, Pak and his lover Kaneko Fumiko were arrested and charged with allegedly plotting to assassinate the Emperor of Japan.

[17] Although Pak and Kaneko were sentenced for the alleged plot, other members of the Rebellious Society managed to remain unmolested by the authorities, as they took no visible direct action.

[16] Former members of the Society returned to Korea, where they established the short-lived Black Flag League (Korean: 흑기연맹; RR: Heukgi yeonmaeng) in 1925.